A-89-027
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REQUIRE TEXTRON LYCOMING TO ISSUE A SERVICE BULLETIN REGARDING INSPECTION AND INSTALLATION OF PROPELLER GOVERNOR OIL LINES. THE BULLETIN SHOULD OUTLINE AN INSPECTION PROCEDURE TO ENSURE THAT THE OIL LINE SUPPORT HARDWARE (CLAMPS, CLIPS, RUBBER HOSES) IS INSTALLED AND TO DETECT ANY CRACKING, ABRASION, MISALIGNMENT, OR OVERTORQUEING OF THE OIL LINE ASSEMBLY. IF ANY COMPONENT IS FOUND CRACKED, OVERTORQUED, OR OTHERWISE DEFECTIVE, OR IF THE REQUIRED OIL LINE SUPPORT HARDWARE IS NOT INSTALLED, THE OIL LINE ASSEMBLY SHOULD BE REMOVED AND REPLACED WITH A NEW ASSEMBLY. AN INSTALLATION PROCEDURE SHOULD EMPHASIZE THE IMPORTANCE OF PROPER SUPPORT, ALIGNMENT, AND TORQUEING OF THE OIL LINE ASSEMBLY; OUTLINE PROPER PROCEDURES NECESSARY TO AVOID DAMAGING THE OIL LINE WHILE INSTALLING THE ALTERNATOR ASSEMBLY; AND REQUIRE THAT ALL EXISTING ALUMINUM NUTS AND ELBOWS USED TO ATTACH THE OIL LINE TO THE ENGINE BE REPLACED WITH STEEL COMPONENTS.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to mandate that Textron Lycoming issue a service bulletin outlining inspection and installation procedures for propeller governor oil lines. The bulletin should specify checks for proper support hardware, cracking, misalignment, and overtorquing, with replacement of defective assemblies. It must also require replacing aluminum nuts and elbows with steel components and emphasize correct alignment and torque during installation.
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 | Jun 22, 1990 |
| NTSB number | MIA86LA209 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).