Wed, Sep 25, 2019
AD NUMBER: 2019-18-08
PRODUCT: All Engine Alliance (EA) GP7270 and GP7277 model turbofan engines.
ACTION: Final rule; request for comments.
SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2019-16-04 for the products listed above.
AD 2019-16-04 required a visual inspection of the 1st-stage low-pressure compressor (LPC) rotor assembly, referred to after this as the “engine fan hub assembly,” for damage, a one-time eddy current inspection (ECI) of the engine fan hub blade slot bottom and blade slot front edge for cracks; and removal of parts if damage or defects are found. AD 2019-16-04 also required replacement of the engine fan hub blade lock assembly for certain GP7270 and GP7277 model turbofan engines.
This AD, for certain GP7270 and GP7277 model turbofan engines, reduces the compliance time for the initial ECI and requires repetitive ECIs of the engine fan hub blade slot bottom and blade slot front edge for cracks. This AD also retains the visual inspection requirements of the engine fan hub assembly for all GP7270 and GP7277 model turbofan engines.
This AD was prompted by an uncontained failure of the engine fan hub.
DATES: This AD is effective October 9, 2019. Comments must be received by November 8, 2019.
COST: The FAA estimates that this AD affects zero engines installed on airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:
- ECI: 20 work-hours × $85 per hour = $1,700 per engine.
- Visual inspection: 1 work-hour × $85 per hour = $85 per engine
- Replace fan hub blade lock assembly: Labor: 25 work-hours × $85 per hour = $2,125. Parts: $28,000. Cost per airplane $30,125.
On-Condition Costs
- Replace engine fan hub assembly: 50 work-hours × $85 per hour = $4,250. Parts: $790,500. Cost per engine: $794,750
FMI: AD
More News
Aero Linx: JAARS Nearly 1.5 billion people, using more than 5,500 languages, do not have a full Bible in their first language. Many of these people live in the most remote parts of>[...]
'Airplane Bounced Twice On The Grass Runway, Resulting In The Nose Wheel Separating From The Airplane...' Analysis: The pilot reported, “upon touchdown, the plane jumped back>[...]
"Burt is best known to the public for his historic designs of SpaceShipOne, Voyager, and GlobalFlyer, but for EAA members and aviation aficionados, his unique concepts began more t>[...]
"Polaris Dawn, the first of the program’s three human spaceflight missions, is targeted to launch to orbit no earlier than summer 2024. During the five-day mission, the crew >[...]
There Are SO Many Ways To Get YOUR Aero-News! It’s been a while since we have reminded everyone about all the ways we offer your daily dose of aviation news on-the-go...so he>[...]
ANN's Daily Aero-Linx (05.04.24)
See All