A-90-110
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE APPLICABLE TO THE TEXTRON LYCOMING TIO-540-AE2A ENGINE TO REQUIRE, WITHIN A SPECIFIED TIME, INSPECTION AND REPLACEMENT, AS NECESSARY, OF THE EXISTING CLAMPING BOLTS FOR THE LEFT TURBOCHARGER TRANSITION PIPE FLANGE TO THE WASTEGATE TRANSITION MATING FLANGE. INSPECTION, REPLACEMENT WITH LONGER BOLTS, AND PROPER TORQUE VALUES SHOULD BE IN ACCORDANCE WITH THE LATEST ISSUE OF TEXTRON LYCOMING SERVICE BULLETIN NO. 491.
In plain language (FlightFinder summary)
The National Transportation Safety Board asks the Federal Aviation Administration to issue an airworthiness directive for the Textron Lycoming TIO-540-AE2A engine, requiring within a specified time the inspection and replacement, as necessary, of the clamping bolts for the left turbocharger transition pipe flange to the wastegate transition mating flange, following the latest issue of Textron Lycoming Service Bulletin No. 491.
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 | May 6, 1993 |
| NTSB number | DEN90FA027 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).