A-85-053
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: IDENTIFY THE PRATT & WHITNEY JT8D-15, -17, AND -17R SERIES ENGINES IN SERVICE THAT HAVE HAD REPAIRS MADE TO THE ROTATING OUTER AIR SEAL GROOVE IN THE 2ND STAGE LOW-PRESSURE TURBINE (LPT) DISK AND WHICH WERE NOT REASSEMBLED TO THE TOLERANCE IN SB-5510, AND REQUIRE EARLY DISASSEMBLY OF THE 2ND STAGE LPT MODULE FOR INSPECTION, REPAIR, AND REASSEMBLY IN ACCORDANCE WITH SB-5510, OR SOME OTHER APPROVED PROCEDURE.
In plain language (FlightFinder summary)
The NTSB asks the FAA to identify Pratt & Whitney JT8D-15, -17, and -17R series engines that received repairs to the rotating outer air seal groove in the 2nd stage low-pressure turbine disk but were not reassembled to the tolerance specified in service bulletin SB-5510. The FAA must then require early disassembly of those engines' 2nd stage LPT modules for inspection, repair, and reassembly in accordance with SB-5510 or another approved procedure.
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 - Acceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Jan 15, 1986 |
| NTSB number | DCA85RA021 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).