Airworthiness Directive 99-02-51
one-timeAirworthiness Directives; Allison Engine Company, Inc. AE 3007A and AE 3007C Series Turbofan Engines
What this AD requires
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 99-02-51 that was sent previously to all known U.S. owners and operators of Allison Engine Company, Inc. AE 3007A and AE 3007C series turbofan engines by individual telegrams. This AD prohibits, prior to further flight, all engine ground starts at oil temperatures below 32 deg.F (0 deg.C) unless preflight operational procedures ensure that engine oil temperature is maintained at or above 32 deg.F (0 deg.C). This amendment is prompted by reports of in-flight engine shutdowns. The in-flight engine shutdowns have been attributed to loss of engine oil from the starter shaft seal. The actions specified by this AD are intended to prevent an in-flight engine shutdown due to loss of engine oil from the starter shaft seal.
Which aircraft AD 99-02-51 applies to
Installed on but not limited to Embraer EMB-145 and Cessna 750 series airplanes; applies to each identified engine regardless of modification, alteration, or repair status.
Whether AD 99-02-51 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.