AD 87-04-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | GTSIO-520-N | TELEDYNE CONTINENTAL MOTORS Model GTSIO-520-N Series Engines |
Unsafe Condition
Fuel pump leaks, fluctuating fuel flow, engine failure, and/or engine compartment fire due to improper torque on attaching screws of the rotary fuel pump, P/N 643367 or 643367A2.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect attaching screws on the regulator valve cover for blue or green paint markings. If markings are present, logbook entry required. If not, remove safety wire, loosen screws, tighten to 24-27 inch pounds, safety wire with MS20995C32 wire, and logbook entry.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 10 flight hours after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
TELEDYNE CONTINENTAL MOTORS Model GTSIO-520-N Series Engines equipped with rotary fuel pump P/N 643367 or 643367A2 manufactured by Lear Siegler Romec.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.