[Federal Register Volume 85, Number 144 (Monday, July 27, 2020)]
[Rules and Regulations]
[Pages 45081-45084]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-16175]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0009; Project Identifier MCAI-2019-00111-E; 
Amendment 39-21175; AD 2020-15-12]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG 
(Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2018-08-02 
for all Rolls-Royce Deutschland Ltd & Co KG (RRD) Trent 1000-A2, Trent 
1000-AE2, Trent 1000-C2, Trent 1000-CE2, Trent 1000-D2, Trent 1000-E2, 
Trent 1000-G2, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 
1000-L2 model turbofan engines. AD 2018-08-02 required initial and 
repetitive ultrasonic or visual inspections of the intermediate-
pressure compressor (IPC) stage 1 rotor blades, IPC stage 2 rotor 
blades, and IPC shaft stage 2 dovetail posts, and removal of any 
cracked parts from service. This AD requires new inspections based on 
updated inspection thresholds and intervals for these IPC parts. This 
AD also adds an optional terminating action, amends the asymmetric 
power condition for engine inspection, and requires an inspection after 
a cabin depressurization event. This AD was prompted by IPC blade 
separations resulting in engine failures. Subsequently, the 
manufacturer identified the need to add new inspections and an optional 
terminating action, amend the asymmetric power condition for engine 
inspection, and require an inspection after a cabin depressurization 
event. The FAA is issuing this AD to address the unsafe condition on 
these products.

DATES: This AD is effective August 31, 2020.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of August 31, 
2020.

ADDRESSES: For service information identified in this final rule, 
contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, 15827 
Blankenfelde-Mahlow, Germany; phone: +49 (0) 33 708 6 0; email: https://www.rolls-royce.com/contact-us.aspx. You may view this service 
information at the FAA, Airworthiness Products Section, Operational 
Safety Branch, 1200 District Avenue, Burlington, MA 01803 For 
information on the availability of this material at the FAA, call 781-
238-7759. It is also available on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-
0009.

Examining the AD Docket

    You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-
0009; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this AD, the mandatory continuing airworthiness information (MCAI), any 
comments received, and other information. The address for Docket 
Operations is U.S. Department of Transportation, Docket Operations, M-
30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue 
SE, Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Stephen Elwin, Aerospace Engineer, ECO 
Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-
238-7236; fax: 781-238-7199; email: Stephen.L.Elwin@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 to supersede AD 2018-08-02, Amendment 39-19255 (83 FR 
17746, April 24, 2018), (``AD 2018-08-02''). AD 2018-08-02 applied to 
all RRD Trent 1000-A2, Trent 1000-AE2, Trent 1000-C2, Trent 1000-CE2, 
Trent 1000-D2, Trent 1000-E2, Trent 1000-G2, Trent 1000-H2, Trent 1000-
J2, Trent 1000-K2, and Trent 1000-L2 model turbofan engines. The NPRM 
published in the Federal Register on April 30, 2020 (85 FR 23925). The 
NPRM was prompted by IPC blade separations resulting in engine 
failures. Subsequently, the manufacturer identified cracking of parts 
in-service resulting in the need to require new inspections using new 
inspection thresholds and intervals. The manufacturer also determined 
the need to add an optional terminating action, amend the asymmetric 
power condition for engine inspection, and require an inspection after 
a cabin depressurization event. The NPRM proposed to require new 
inspections based on updated inspection thresholds and intervals for 
these IPC parts. The NPRM also proposed to add an optional terminating 
action, amend the asymmetric power condition for engine inspection, and 
require an inspection after a cabin depressurization event. The FAA is 
issuing this AD to address the unsafe condition on these products.
    The European Union Aviation Safety Agency (EASA), which is the 
Technical Agent for the Member States of the European Community, has 
issued EASA AD 2019-0250, dated October 9, 2019 (referred to after this 
as ``the MCAI''), to address the unsafe condition on these products. 
The MCAI states:

    Occurrences were reported on Rolls-Royce Trent 1000 `Pack C' 
engines, where some IPC Rotor 1 and Rotor 2 blades were found 
cracked.
    This condition, if not detected and corrected, could lead to in-
flight blade release, possibly resulting in reduced control of the 
aeroplane.
    To address this potential unsafe condition, Rolls-Royce 
initially issued Alert NMSB TRENT 1000 72-AJ814 and 72-AJ819 to 
provide inspection instructions for IPC Rotor 1 blades, and IPC 
Rotor 2 blades and IPC shaft Stage 2 dovetail posts, respectively. 
Rolls-Royce also issued NMSB TRENT 1000 72-J871 to provide rework 
instructions for the affected parts, and Alert NMSB TRENT 1000 72-
AJ869 to inspect those post-rework parts. Consequently, EASA issued 
AD 2017-0248 to require repetitive inspections of the affected IPC 
Rotor blades and IPC shaft Stage 2 dovetail posts and, depending on 
findings, removal from service of the engine for corrective action.
    After that [EASA] AD was issued, Rolls-Royce issued Alert NMSB 
TRENT 1000 72-AK058 to provide instructions for a one-time on-wing 
inspection. Consequently, EASA issued AD 2018-0073, retaining the 
requirements of EASA AD 2017-0248, which was superseded, to require 
an additional borescope inspection of certain engines and, depending 
on findings, removal from service of the engine for corrective 
action.
    After that [EASA] AD was issued, it was determined that 
repetitive borescope inspections are necessary on all engines to 
ensure fleet-wide continued safe operation. Consequently, Rolls-
Royce revised Alert NMSB TRENT 1000 72-AJ869, Alert NMSB TRENT 1000 
72-AJ814, Alert NMSB TRENT 1000 72-AJ819 and NMSB TRENT 1000 72-
J871, and issued NMSB TRENT 1000 72-AK060 to consolidate all 
inspection

[[Page 45082]]

instructions. Consequently, EASA issued AD 2018-0084 (later 
revised), retaining the requirements of EASA AD 2018-0073, which was 
superseded, and requiring repetitive on-wing borescope inspections 
of the affected Rotor 1 parts and affected Rotor 2 parts and, 
depending on findings, removal from service of the engine for 
corrective action. That [EASA] AD also introduced specific 
requirements for engines installed on aeroplanes involved in ETOPS, 
and inspection following operation in asymmetric power conditions.
    Rolls-Royce then introduced NMSB Trent 1000 72-AK092 to provide 
inspections for the rear face of the Rotor 2 blades and NMSB TRENT 
1000 72-AK060 was revised (R1) accordingly. Later, Rolls-Royce 
developed mod 72-J941, installing improved IPC Stage 1 and Stage 2 
rotor blades, and issued the modification SB, providing the 
necessary instructions for in-service application. EASA issued AD 
2018-0084R2 to exclude post-mod 72-J941 engines from the 
Applicability and introducing the modification SB as terminating 
action for the repetitive inspections as required by that [EASA] AD.
    Since that [EASA] AD was issued, Rolls-Royce issued the NMSB and 
revised Alert NMSB TRENT 1000 72-AJ814, 72-AJ819 and 72-AK092 to 
introduce new inspections, new thresholds and new intervals, 
depending on engine configuration. These inspections are now 
applicable for all operations, ETOPS and non-ETOPS. The latest 
revision of the NMSB also amended the asymmetric power conditions 
for engine inspection and introduced cabin depressurisation as an 
event to trigger engine inspection(s).
    For the reason described above, this [EASA] AD requires 
introduction of the new inspections, replacing those previously 
imposed by EASA AD 2018-0084R2 (through NMSB TRENT 1000 72-AK060), 
and removes the references to Engine Health Monitoring messages and 
ETOPS-related requirements.

    You may obtain further information by examining the MCAI in the AD 
docket on the internet at https://www.regulations.gov by searching for 
and locating Docket No. FAA-2020-0009.

Comments

    The FAA gave the public the opportunity to participate in 
developing this AD. The FAA has considered the comment received. Boeing 
Commercial Airplanes supported the NPRM.

Conclusion

    The FAA reviewed the relevant data, considered the comments 
received, and determined that air safety and the public interest 
require adopting this AD as proposed.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Rolls-Royce plc (RR) Alert Non-Modification 
Service Bulletin (NMSB) Trent 1000 72-AK313, Revision 1, dated August 
22, 2019; and RR Service Bulletin (SB) Trent 1000 72-J941, Revision 1, 
dated February 6, 2019, and Initial Issue, dated December 6, 2018. RR 
Alert NMSB Trent 1000 72-AK313 defines the initial inspection threshold 
and repeat inspection intervals for Trent 1000 IPC stage 1 blade, stage 
2 blade, and IPC shaft stage 2 dovetail posts. RR SB Trent 1000 72-J941 
describes procedures for modifying the engine by installing the 
redesigned IPC stage 1 and stage 2 rotor blades. This service 
information is reasonably available because the interested parties have 
access to it through their normal course of business or by the means 
identified in the ADDRESSES section.

Other Related Service Information

    The FAA reviewed RR Alert NMSB Trent 1000 72-AJ819, Revision 4, 
dated May 3, 2019; RR Alert NMSB Trent 1000 72-AJ814, Revision 5, dated 
May 3, 2019; and RR Alert NMSB Trent 1000 72-AK092, Revision 4, dated 
May 3, 2019. RR Alert NMSB Trent 1000 72-AJ819 describes procedures for 
performing a visual borescope inspection of the IPC stage 2 rotor 
blades and IPC shaft stage 2 dovetail posts. RR Alert NMSB Trent 1000 
72-AJ814 describes procedures for performing an ultrasonic inspection 
(USI) of the IPC stage 1 rotor blades. RR Alert NMSB Trent 1000 72-
AK092 describes procedures for performing a USI of the IPC stage 2 
rotor blades.

Costs of Compliance

    The FAA estimates that this AD affects 7 engines installed on 
airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Inspect the IPC stage 1 blade root      20 work-hours x $85 per               $0          $1,700         $11,900
 (Front Face).                           hour = $1,700.
Inspect the IPC stage 2 blade root      6 work-hours x $85 per                 0             510           3,570
 (Front Face) and IPC shaft stage 2      hour = $510.
 dovetail post (Front Face).
Inspect the IPC stage 2 blade root      10 work-hours x $85 per                0             850           5,950
 (Rear Face).                            hour = $850.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary 
replacements that would be required based on the results of the 
mandated inspection. The FAA has no way of determining the number of 
engines that might need these replacements:

                                               On-condition costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                    Action                                 Labor cost               Parts cost        product
----------------------------------------------------------------------------------------------------------------
Replace all 34 R1 Blades......................  280 work-hours x $85 per hour =          $52,360         $76,160
                                                 $23,800.
Replace all 49 R2 Blades......................  280 work-hours x $85 per hour =           48,755          72,555
                                                 $23,800.
Replace IPC Drum..............................  144 work-hours x $85 per hour =        1,370,000       1,382,240
                                                 $12,240.
----------------------------------------------------------------------------------------------------------------

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, Section 106, describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the Agency's authority.

[[Page 45083]]

    The FAA is issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    This AD will not have federalism implications under Executive Order 
13132. This AD will not have a substantial direct effect on the States, 
on the relationship between the national Government and the States, or 
on the distribution of power and responsibilities among the various 
levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Will not affect intrastate aviation in Alaska, and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends part 39 of the Federal Aviation 
Regulations (14 CFR part 39) as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by:
0
a. Removing Airworthiness Directive (AD) 2018-08-02, Amendment 39-19255 
(83 FR 17746, April 24, 2018); and
0
b. Adding the following new AD:

2020-15-12 Rolls-Royce Deutschland Ltd & Co KG (Type Certificate 
previously held by Rolls-Royce plc): Amendment 39-21175; Docket No. 
FAA-2020-0009; Project Identifier MCAI-2019-00111-E.

(a) Effective Date

    This AD is effective August 31, 2020.

(b) Affected ADs

    This AD replaces AD 2018-08-02, Amendment 39-19255 (83 FR 17746, 
April 24, 2018).

(c) Applicability

    This AD applies to Rolls-Royce Deutschland Ltd & Co KG (Type 
Certificate previously held by Rolls-Royce plc) Trent 1000-A2, Trent 
1000-AE2, Trent 1000-C2, Trent 1000-CE2, Trent 1000-D2, Trent 1000-
E2, Trent 1000-G2, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and 
Trent 1000-L2 model turbofan engines, except those that have the 
redesigned intermediate-pressure compressor (IPC) stage 1 and stage 
2 rotor blades introduced by Rolls-Royce plc (RR) Service Bulletin 
(SB) Trent 1000 72-J941, Revision 1, dated February 6, 2019.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7230, Turbine Engine 
Compressor Section.

(e) Unsafe Condition

    This AD was prompted by IPC blade separations resulting in 
engine failures. Subsequently, the manufacturer identified cracking 
of parts in-service resulting in the need to require new inspections 
using new inspection thresholds and intervals. The manufacturer also 
determined the need to add an optional terminating action, amend the 
asymmetric power condition for engine inspection, and require an 
inspection after a cabin depressurization event. The FAA is issuing 
this AD to prevent failure of the IPC. The unsafe condition, if not 
addressed, could result in failure of one or more engines, loss of 
thrust control, and loss of the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

    (1) After the effective date of this AD, before exceeding the 
initial inspection thresholds and repeat inspection intervals 
specified in Table 1 of RR Alert Non-Modification Service Bulletin 
(NMSB) Trent 1000 72-AK313, Revision 1, dated August 22, 2019 (``RR 
NMSB Trent 1000 72-AK313, R1''):
    (i) Perform initial ultrasonic inspections (USIs) of the IPC 
stage 1 blade root (front face).
    (ii) Thereafter, perform repetitive USIs of the IPC stage 1 
blade root (front face).
    (iii) Use the Accomplishment Instructions, paragraph 3.A.(1)(a) 
(on-wing) or 3.A.(2)(a) and (b) (in-shop) of RR NMSB Trent 1000 72-
AK313, R1 to perform the inspections.
    (2) After the effective date of this AD, before exceeding the 
initial inspection thresholds and repeat inspection intervals 
specified in Table 2 of RR NMSB Trent 1000 72-AK313, R1:
    (i) Perform initial visual inspections of the IPC stage 2 blade 
root (front face) and IPC shaft stage 2 dovetail post (front face).
    (ii) Thereafter, perform repetitive visual inspections of the 
IPC stage 2 blade root (front face) and IPC shaft stage 2 dovetail 
post (front face).
    (iii) Use the Accomplishment Instructions, paragraph 3.B.(1)(a) 
(on-wing) or 3.B.(2)(b) (in-shop) of RR NMSB Trent 1000 72-AK313, R1 
to perform the inspections.
    (3) After the effective date of this AD, before exceeding the 
initial inspection threshold and repeat inspection intervals 
specified in Table 2 of RR NMSB Trent 1000 72-AK313, R1:
    (i) Perform initial USIs of IPC stage 2 blade root (rear face).
    (ii) Thereafter, perform repetitive USIs of IPC stage 2 blade 
root (rear face).
    (iii) Use the Accomplishment Instructions, paragraph 3.C.(1)(a) 
(on-wing) or 3.C.(2)(a) (in-shop) of RR NMSB Trent 1000 72-AK313, R1 
to perform the inspections.
    (4) After the effective date of this AD, within 5 engine flight 
cycles (FCs) after each occurrence in which any engine operates in 
asymmetric power conditions at an altitude of less than 28,000 feet, 
perform the following inspections on the engine not affected by the 
power reduction or in-flight shutdown (IFSD):
    (i) Perform initial USIs and visual inspections required by 
paragraphs (g)(1), (2), and (3) of this AD.
    (ii) Thereafter, perform the repetitive USIs and visual 
inspections required by paragraphs (g)(1), (2), and (3) of this AD.
    (iii) Use the service information and repetitive inspection 
thresholds required by paragraphs (g)(1)(iii), (2)(iii), and 
(3)(iii) to perform the inspections, as applicable.
    (5) After the effective date of this AD, within 5 engine FCs 
following a cabin depressurization event, perform the following 
inspections on both engines installed on the airplane:
    (i) Perform initial USIs and visual inspections required by 
paragraphs (g)(1), (2), and (3) of this AD.
    (ii) Thereafter, perform the repetitive USIs and visual 
inspections required by paragraphs (g)(1), (2), and (3) of this AD.
    (iii) Use the service information and repetitive inspection 
thresholds required by paragraphs (g)(1)(iii), (2)(iii), and 
(3)(iii) to perform the inspections, as applicable.
    (6) If any IPC stage 1 blade root (front face), IPC stage 2 
blade root (front face), IPC shaft stage 2 dovetail post (front 
face), or IPC stage 2 blade root (rear face) is found cracked during 
any inspection required by this AD, replace the part with a part 
eligible for installation before further flight.

(h) Terminating Action (Optional)

    Modification of an engine by installing the redesigned IPC stage 
1 and stage 2 rotor blades, using RR SB Trent 1000 72-J941, Revision 
1, dated February 6, 2019, or Initial Issue, dated December 6, 2018, 
is the terminating action for the initial and repetitive ultrasonic 
or visual inspection requirements, as applicable, of paragraph 
(g)(1) through (5) of this AD for that engine.

(i) Definition

    For the purpose of this AD, an ``asymmetric power condition'' is 
the

[[Page 45084]]

operation of the airplane at an altitude of less than 28,000 feet, 
experiencing either single engine take-off, engine fault (reduced 
power on one engine), or single engine IFSD, which includes 
execution of any non-normal checklist procedure.

(j) Credit for Previous Actions

    You may take credit for the initial inspections required by 
paragraphs (g)(1) through (5) of this AD if you performed these 
inspections before the effective date of this AD using any of the 
following.
    (1) RR Alert NMSB Trent 1000 72-AJ819, Revision 3, dated April 
13, 2018, or earlier revisions;
    (2) RR NMSB Trent 1000 72-AJ814, Revision 4, dated September 28, 
2018, or earlier revisions;
    (3) RR Alert NMSB Trent 1000 72-AK313, Initial Issue, dated May 
2, 2019; or
    (4) RR Alert NMSB Trent 1000 72-AK092, Revision 3, dated 
February 28, 2019 or earlier revisions.

(k) Special Flight Permit

    Special flight permits, as described in Section 21.197 and 
Section 21.199 of the Federal Aviation Regulations (14 CFR 21.197 
and 21.199), are subject to the requirements of paragraph (k)(1) of 
this AD.
    (1) Operators who are prohibited from further flight due to a 
crack finding as a result of paragraph (g) of this AD, may perform a 
one-time non-revenue ferry flight to a location where the engine can 
be removed from service. This ferry flight must be performed without 
passengers, involve non-ETOPS operation, and consume no more than 
three FCs.
    (2) [Reserved]

(l) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, ECO Branch, FAA, has the authority to approve 
AMOCs for this AD, if requested using the procedures found in 14 CFR 
39.19. In accordance with 14 CFR 39.19, send your request to your 
principal inspector or local Flight Standards District Office, as 
appropriate. If sending information directly to the manager of the 
certification office, send it to the attention of the person 
identified in paragraph (m)(1) of this AD. You may email your 
request to: ANE-AD-AMOC@faa.gov.
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(m) Related Information

    (1) For more information about this AD, contact Stephen Elwin, 
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: 781-238-7236; fax: 781-238-7199; email: 
Stephen.L.Elwin@faa.gov.
    (2) Refer to European Union Aviation Safety Agency (EASA) AD 
2019-0250, dated October 9, 2019, for more information. You may 
examine the EASA AD in the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-
2020-0009.

(n) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) Rolls-Royce plc (RR) Alert Non-Modification Service Bulletin 
Trent 1000 72-AK313, Revision 1, dated August 22, 2019.
    (ii) RR Service Bulletin (SB) Trent 1000 72-J941, Revision 1, 
dated February 6, 2019.
    (iii) RR SB Trent 1000 72-J941, Initial Issue, dated December 6, 
2018.
    (3) For RR service information identified in this AD, contact 
Rolls-Royce Deutschland Ltd. & Co KG, Eschenweg 11, 15827 
Blankenfelde-Mahlow, Germany; phone: +49 (0) 33 708 6 0; email: 
https://www.rolls-royce.com/contact-us.aspx.
    (4) You may view this service information at FAA, Airworthiness 
Products Section, Operational Safety Branch, 1200 District Avenue, 
Burlington, MA 01803. For information on the availability of this 
material at the FAA, call 781-238-7759.
    (5) You may view this service information at the National 
Archives and Records Administration (NARA). For information on the 
availability of this material at NARA, email: fedreg.legal@nara.gov, 
or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on July 15, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2020-16175 Filed 7-24-20; 8:45 am]
BILLING CODE 4910-13-P


