A-06-061
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 not been reworked in accordance with General Electric Service Bulletins (SB) 72-0788 or 72-1089 but have been inspected in accordance with SB 72-0779 or Alert Service Bulletin (ASB) 72-A1026 and have more than 3,000 cycles since the inspection be immediately removed from service for reinspection 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 not been reworked in accordance with SBs 72-0788 or 72-1089 but have been inspected in accordance with SB 72-0779 or ASB 72-A1026 and have fewer than 3,000 cycles since the inspection can remain in service until reaching the 3,000 cycles-since-inspection threshold, at which time they should also be removed from service for reinspection and rework. (Urgent)
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to mandate the immediate removal from service of certain CF6-80A, -80C2, and -80E1 high pressure turbine stage 1 disks that have not been reworked per General Electric Service Bulletins 72-0788 or 72-1089, but have been inspected per Service Bulletin 72-0779 or Alert Service Bulletin 72-A1026, and have accumulated more than 3,000 cycles since that inspection; these disks must be reinspected and reworked. Disks of the same types with fewer than 3,000 cycles since inspection may remain in service until they reach that threshold, at which point they must also be removed for reinspection and rework.
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).