[Federal Register Volume 84, Number 115 (Friday, June 14, 2019)]
[Rules and Regulations]
[Pages 27707-27708]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-12626]


=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 21

[Docket No. FAA-2019-0197]


Airworthiness Criteria: Glider Design Criteria for Alexander 
Schleicher GmbH & Co. Segelflugzeugbau Model ASK 21 B Glider

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Issuance of final airworthiness design criteria.

-----------------------------------------------------------------------

SUMMARY: These airworthiness design criteria are issued to Alexander 
Schleicher GmbH & Co. Segelflugzeugbau for the Model ASK 21 B glider. 
The administrator finds the design criteria, which make up the 
certification basis for the Model ASK 21 B glider, acceptable.

DATES: These airworthiness design criteria are effective July 15, 2019.

FOR FURTHER INFORMATION CONTACT: Mr. Jim Rutherford, AIR-692, Federal 
Aviation Administration, Policy & Innovation Division, Small Airplane 
Standards Branch, 901 Locust, Room 301, Kansas City, MO 64106, 
telephone (816) 329-4165, FAX (816) 329-4090.

SUPPLEMENTARY INFORMATION: 

Background

    On August 16, 2018, Alexander Schleicher GmbH & Co. 
Segelflugzeugbau (Alexander

[[Page 27708]]

Schleicher) applied for validation of a type certificate change to add 
the Model ASK 21 B glider in accordance with the ``Technical 
Implementation Procedures for Airworthiness and Environmental 
Certification Between the FAA and the European Aviation Safety Agency 
(EASA),'' Revision 6, dated September 22, 2017. This model is a 
modified version of the Model ASK 21 glider and will be documented on 
existing Type Certificate Number (No.) G47EU. The Model ASK 21 B is a 
two-seat, mid-wing glider constructed from glass-fiber reinforced 
plastic and features a 55.8 foot (17 meters) wingspan with airbrakes on 
the upper wing surface. The glider has a non-retractable landing gear 
with a nose wheel and shock-absorbed, braked main wheel and a T-type 
tailplane. The glider has a maximum weight of 1,323 pounds (600 
kilograms).
    EASA type certificated the Model ASK 21 B glider in the utility and 
aerobatic categories and issued Type Certificate No. EASA.A.221, dated 
August 9, 2018. The associated EASA Type Certificate Data Sheet (TCDS) 
No. EASA.A.221 defined the certification basis, which Alexander 
Schleicher submitted to the FAA for review and acceptance.
    Gliders are type certificated by the FAA as special class aircraft 
for which airworthiness standards have not yet been established by 
regulation. Under the provisions of 14 CFR 21.17(b), the airworthiness 
standards for special class aircraft are those found by the FAA to be 
appropriate and applicable to the specific type design. FAA Advisory 
Circular (AC) 21.17-2A \1\ provides guidance on acceptable design 
criteria for the type certification of gliders and powered gliders in 
the United States. AC 21.17-2A allows applicants to utilize the Joint 
Aviation Requirements (JAR)-22,\2\ other airworthiness criteria 
comparable to 14 CFR part 23, or a combination of both as the means for 
showing compliance for glider certification.
---------------------------------------------------------------------------

    \1\ Ref AC 21.17-2A, ``Type Certification--Fixed-Wing Gliders 
(Sailplanes), Including Powered Gliders,'' dated February 10, 1993.
    \2\ Ref JAR-22, ``Sailplanes and Powered Sailplanes.''
---------------------------------------------------------------------------

Comments

    Airworthiness Criteria: Glider Design Criteria for Alexander 
Schleicher GmbH & Co. Segelflugzeugbau Model ASK 21 B Glider was 
published in the Federal Register on April 2, 2019 (84 FR 12529). No 
comments were received and the airworthiness design criteria are 
adopted as proposed.

Type Certification Basis

    The certification basis for the Model ASK 21 B will be the same as 
the certification basis for the Model ASK 21 as shown on TCDS No. 
G47EU, Revision 1, except for areas affected by the change, which will 
use EASA Certification Specification (CS)-22 \3\ as shown in these 
airworthiness design criteria.
---------------------------------------------------------------------------

    \3\ Ref EASA CS-22, ``Certification Specifications for 
Sailplanes and Powered Sailplanes,'' amendment 2, dated March 5, 
2009.
---------------------------------------------------------------------------

Citation

    The authority citation for these airworthiness design criteria is 
as follows:

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

The Airworthiness Design Criteria

Applicable Airworthiness Criteria Under 14 CFR 21.17(b)

    Based on the Special Class provisions of Sec.  21.17(b), the 
following airworthiness requirements form the FAA certification basis 
for the Model ASK 21 B:
    1. 14 CFR part 21, effective February 1, 1965, including amendments 
21-1 through 21-53.
    2. Lufttuechtigkeitsforderungen fuer Segelflugzeuge and Motorsegler 
(LFSM) Airworthiness Requirements for Sailplanes and Powered 
Sailplanes, dated October 23, 1975.
    3. JAR-22, dated April 1, 1980, including amendment 1, dated May 
18, 1981.
    4. CS-22, amendment 2, dated March 5, 2009, for the following 
regulations: CS 22.147, 22.455, 22.477, 22.561 except (b)(2), 22.595, 
22.597, 22.629, 22.677, 22.685, 22.689, 22.721, 22.771, 22.773, 22.777, 
22.779, 22.780, 22.781, 22.785, 22.786, 22.787, 22.788, 22.807, and 
22.831.
    5. AC 21.23-1, section 5(e)(6), dated January 12, 1981.
    6. Operations are limited to Day VFR and to flying in Instrument 
Meteorological Conditions (IMC) if the glider is equipped as required 
under 14 CFR 91.205. Night operation is prohibited.
    7. FAA Type Certificate Application Date: August 16, 2018.
    8. EASA Type Certificate No. EASA.A.221, Issue 05, dated August 9, 
2018.

    Issued in Kansas City, Missouri, on June 5, 2019.
Pat Mullen,
Manager, Small Airplane Standards Branch, Policy & Innovation Division, 
Aircraft Certification Service.
[FR Doc. 2019-12626 Filed 6-13-19; 8:45 am]
 BILLING CODE 4910-13-P


