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Federal Register / Vol. 86, No. 157 / Wednesday, August 18, 2021 / Rules and Regulations List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

NY KUBIC
EK spol. s r.o.:
20211614 BALO
Amendment 3921676; Docket No.
FAA20210618; Project Identifier 2019CE005AD.
a Effective Date This airworthiness directive AD is effective September 7, 2021.
b Affected ADs None.
c Applicability NY
This AD applies to the following BALO
KUBICEK spol. s r.o. balloons, certificated in any category:
1 Model BB78Z, serial numbers S/Ns 1292 and 1364;
2 Model BB85Z, S/N 1360;
3 Model BB92Z, S/N 1331; and 4 Model BB130P, S/N 1397.

e Unsafe Condition This AD was prompted by mandatory continuing airworthiness information MCAI
issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI
describes the unsafe condition as failure of the envelope vertical load tape. The FAA is issuing this AD to detect and correct defects in the envelope vertical load tape, which could result in an envelope tear and consequent uncontrolled descent.

jbell on DSKJLSW7X2PROD with RULES

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

Jkt 253001

i Related Information 1 For more information about this AD, contact Mike Kiesov, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106; phone: 816 3294144; fax: 816
3294090; email: mike.kiesov@faa.gov.
2 Refer to European Aviation Safety Agency EASA AD 20180181, dated August 27, 2018, for more information. You may examine the EASA AD in the AD docket at https www.regulations.gov by searching for and locating it in Docket No.
j Material Incorporated by Reference None.

FR Doc. 202117604 Filed 81721; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210447; Project Identifier AD202100131E; Amendment 3921692; AD 20211709
RIN 2120AA64

g Inspection and Repair Within 30 days after the effective date of this AD, inspect the envelope load tape for weaving defects indicated by visible yellow thread. If there is visible yellow thread in any envelope load tape, before further flight, repair any damaged area of the envelope load tape.

16:01 Aug 17, 2021

h Alternative Methods of Compliance AMOCs 1 The Manager, International Validation 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 Related Information, paragraph i1 of this AD or email 9-AVS-AIR-730AMOC@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.

Issued on August 5, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.

d Subject Joint Aircraft System Component JASC
Code 5300, Fuselage.

VerDate Sep<11>2014

NY
Note 1 to paragraph g: BALO
KUBICEK spol. s r.o. Servis Bulletin No. BB/
52, dated July 23, 2018, includes an example of a weaving defect and specifies acceptable procedures and materials for repairing envelope load tape.

Airworthiness Directives; Pratt &
Whitney Turbofan Engines Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for all Pratt & Whitney PW1500G and PW1900G

SUMMARY:

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series turbofan engines. This AD was prompted by reports of cracks in the high-pressure compressor HPC rotor shaft that resulted in in-flight shutdowns IFSDs and unscheduled engine removals UERs. This AD
requires removal and replacement of the HPC front hub and HPC rotor shaft. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective September 22, 2021.
ADDRESSES: For service information identified in this final rule, contact Pratt & Whitney, 400 Main Street, East Hartford, CT 06118; phone: 800 565
0140; email: help24@pw.utc.com;
website: https
fleetcare.prattwhitney.com/. 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 at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0447.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210447; 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 final rule, 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 W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Mark Taylor, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone:
781 2387229; fax: 781 2387199;
email: Mark.Taylor@faa.gov.
SUPPLEMENTARY INFORMATION:
Background The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to all PW1519G, PW1521G, PW1521G3, PW1521GA, PW1524G, PW1524G3, PW1525G, PW1525G3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923GA model turbofan engines. The NPRM published in the Federal Register on June 3, 2021
86 FR 29707. The NPRM was prompted by reports of cracks in the HPC rotor shaft that resulted in vibration and subsequent IFSDs and
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