A-06-060
NTSB Safety Recommendation — Aviation
Recommendation text
TO THE FEDERAL AVIATION ADMINISTRATION: Require that all CF6-80A and -80C2 high pressure turbine (HPT) stage 1 disks and applicable -80E1 HPT stage 1 disks that have more than 3,000 cycles since new (CSN) and have not been reworked in accordance with General Electric Service Bulletins (SB) 72-0788 or 72-1089 or have not yet been inspected in accordance with SB 72-0779 or Alert Service Bulletin 72-A1026 be immediately removed from service for inspection and rework in accordance with these SBs. Those CF6-80A and -80C2 HPT stage 1 disks and applicable -80E1 HPT stage 1 disks that have fewer than 3,000 CSN and have not been reworked or inspected in accordance with these SBs can remain in service until reaching the 3,000 CSN threshold, at which time they should also be removed from service for inspection and rework. (Urgent)
In plain language (FlightFinder summary)
The FAA is urged to mandate the immediate removal of specific high-pressure turbine disks that have exceeded 3,000 flight cycles and lack required maintenance inspections or modifications. These parts must be taken out of service for necessary checks and repairs according to manufacturer guidelines. Disks with fewer than 3,000 cycles may continue operating until they reach that limit, at which point they must also undergo the same inspection and rework process. This urgent measure aims to address potential safety risks associated with these engine components.
This plain-language summary is written by FlightFinder to explain the recommendation above. It is not the official wording — the verbatim NTSB text is quoted above.
Details
| Status | Closed - Unacceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Sep 23, 2009 |
| NTSB number | ENG06IA018 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).