A-86-025
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE A TELEGRAPHIC AIRWORTHINESS DIRECTIVE AND AMEND THE AIRWORTHINESS DIRECTIVE PROPOSED IN THE NOTICE OF PROPOSED RULEMAKING PUBLISHED AT 50 FR 46444, DOCKET NO. 85-ANE-34, TO REQUIRE THAT THE COMBUSTION CHAMBERS OF PRATT & WHITNEY AIRCRAFT JT8D-1 THROUGH -17AR ENGINES BE INSPECTED (AND REMOVED OR REPAIRED, AS NECESSARY) IN ACCORDANCE WITH PRATT & WHITNEY SERVICE BULLETIN NO. 5649. INSPECTION OF THE COMBUSTION CHAMBERS SHOULD BE SCHEDULED WITH CONSIDERATION GIVEN TO COMBUSTION CHAMBER TIME/CYCLES SINCE INSTALLATION OR REPAIR AND TO ENSURE THAT VERY HIGH-TIME COMBUSTION CHAMBERS ARE INSPECTED AS SOON AS PRACTICAL AND WELL BEFORE THE 1,000 HOURS (OR 1,000 CYCLES) PERMITTED IN THE PROPOSED AIRWORTHINESS DIRECTIVE.
In plain language (FlightFinder summary)
The FAA is asked to issue a telegraphic airworthiness directive and amend a previously proposed directive (50 FR 46444, Docket No. 85-ANE-34) to require inspection (and removal or repair as necessary) of combustion chambers on Pratt & Whitney JT8D-1 through -17AR engines, following Pratt & Whitney Service Bulletin No. 5649. The inspections should be scheduled based on time since installation or repair, ensuring that very high-time combustion chambers are inspected as soon as practical and well before the 1,000 hours or cycles allowed in the proposed directive.
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| Status | Closed--No Longer Applicable |
|---|---|
| Mode | Aviation |
| Closed | Aug 3, 1987 |
| NTSB number | MIA86IA072 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).