AD: Pratt & Whitney | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Most Recent Daily Episodes

Episode Date

Airborne-Monday

Airborne-Tuesday

Airborne-Wednesday Airborne-Thursday

Airborne-Friday

Airborne On YouTube

Airborne-Unlimited-03.10.25

Airborne-NextGen-03.11.25

Airborne-Unlimited-03.12.25

Airborne-AffordableFlyers-03.13.25

Airborne-Unlimited-03.14.25

Tue, Nov 04, 2003

AD: Pratt & Whitney

AD NUMBER: 2003-22-09
MANUFACTURER:
Pratt & Whitney
SUBJECT: Airworthiness Directive 2003-22-09


SUMMARY: The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney PW4074, PW4074D, PW4077, PW4077D, PW4084, PW4084D, PW4090, PW4090D, PW4090-3, and PW4098 turbofan engines. This AD requires borescope inspection of the No. 3 bearing weep tube, on engines with high oil consumption that troubleshooting procedures fail to determine the source of oil loss. This AD also requires for all engines, initial and repetitive visual inspections of the turbine exhaust case (TEC) in the vicinity of the No 3 bearing oil vent tube for evidence of oil wetting or staining. If the vent tube borescope inspection is unsuccessful due to tube blockage, this AD also requires borescope inspections of the high pressure turbine (HPT) assembly for oil wetting or staining.
This AD also requires removal of the HPT assembly and replacement of any heat distressed HPT assembly hardware if oil wetting or staining is found. This AD is prompted by reports of engine HPT assembly hardware being damaged as a result of thermal distress from oil igniting after leaking from the No. 3 bearing compartment. We are issuing this AD to prevent thermal distressed HPT assembly hardware from remaining in service, which could result in a cracked HPT stage 1 disk or HPT stage 1-2 air seal and an uncontained engine failure.

FMI: www.avantext.com/DailyADIndex.ASP?AD=20032209

Advertisement

More News

Aero-News: Quote of the Day (03.12.25)

"The right to organize has been fundamental in advancing safety and quality of life improvements for workers across the country. ALPA pilots know first-hand the benefits of union m>[...]

Aero-News: Quote of the Day (03.13.25)

“Introducing a new helicopter to the light twin engine segment is a testimony to our commitment to meeting our customers’ evolving mission requirements, leveraging our >[...]

Airborne 03.10.25: KISM Fee Revolt, B29 Doc-Abilene, Flying for the Greater Good

Also: FAA Safety Steps, Captain Judy Cameron Scholarship, Salem Airport RWY Fight, GA-ASI’s New Uncrewed Fighter After months of pushback from local pilots and aviation group>[...]

Klyde Morris (03.10.25)

Klyde Now Believes That You Can Find ANYTHING On EBay... FMI: www.klydemorris.com>[...]

ANN's Daily Aero-Term (03.13.25): Basic Radar Service

Basic Radar Service These services are provided for VFR aircraft by all commissioned terminal radar facilities. Basic radar service includes safety alerts, traffic advisories, limi>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2025 Web Development & Design by Pauli Systems, LC