Airworthiness Directives; Pratt & Whitney RTX Corporation (Type Certificate Previously Held by Pratt & Whitney Division United Technologies Corporation) Engines
Published . Updated .
The FAA proposes to supersede Airworthiness Directive (AD) 2026-09-02, which applies to certain Pratt & Whitney RTX Corporation (PW) Model PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 engines. AD 2026-09-02 requires repetitive angle ultrasonic scan inspections (AUSIs) of the high-pressure compressor (HPC) 15th- stage disks, front turbine hubs, high-pressure turbine (HPT) 1st-stage air seals, and HPT 2nd-stage hubs for crack indications, and removal from service and replacement if necessary, and for certain serial numbers, removal from service and replacement of the HPT 1st-stage air seal. Since the FAA issued AD 2026-09-02, the FAA was notified that a certain part number was omitted from AD 2026-09-02 and the applicability of the optional terminating action was matched to an unrelated requirement. This proposed AD would require repetitive AUSIs of the HPC 15th-stage disks, front turbine hubs, HPT 1st-stage air seals, and HPT 2nd-stage hubs for crack indications, and removal from service and replacement if necessary, and for certain serial numbers, removal from service and replacement of the HPT 1st-stage air seal. The FAA is proposing this AD to address the unsafe condition on these products.
Directly affected
Indirectly affected
- SPR Spirit AeroSystems
Spirit builds Boeing fuselages, so a Boeing aircraft story reaches this supplier
- GE GE Aerospace
GE Aerospace supplies and competes in commercial aircraft engines
- DAL Delta Air Lines
Delta flies the 737, so a Boeing aircraft story reaches its fleet
- LMT Lockheed Martin
Lockheed Martin is a defense and aerospace peer
- HWM Howmet Aerospace
Howmet supplies parts used on commercial and defense aircraft
- UAL United Airlines
United flies the 737, so a Boeing aircraft story reaches its fleet
- NOC Northrop Grumman
Northrop Grumman is a defense and aerospace peer
- TDG TransDigm
TransDigm supplies aircraft components to Boeing and the airlines
- AAL American Airlines
American flies the 737, so a Boeing aircraft story reaches its fleet
Price reaction, T-5 to T+3
The FAA proposes to supersede Airworthiness Directive (AD) 2026-09-02, which applies to certain Pratt & Whitney RTX Corporation (PW) Model PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 engines. AD 2026-09-02 requires repe…
Source: Federal Register
Where this story sits: Taiwan Strait
Taiwan Strait has 49 linked stories in the last 7 days and 49 in the last 30 on the page that also carries “Airworthiness Directives; Pratt & Whitney RTX Corporation (Type Certificate Previously Held by Pratt & Whitney Division United Technologies Corporation) Engines.” The recent pace is rising.
Taiwan Strait
25 out of 100
“Airworthiness Directives; Pratt & Whitney RTX Corporation (Type Certificate Previously Held by Pratt & Whitney Division United Technologies Corporation) Engines” scores 25 out of 100. The score uses 2 sources.