Airworthiness Directive 98-05-10
one-timeAirworthiness Directives; Robinson Helicopter Company Model R44 Helicopters
What this AD requires
This amendment adopts a new airworthiness directive (AD) that is applicable to Robinson Helicopter Company (Robinson) Model R44 helicopters. This action requires replacing the aluminum elbows that connect the oil cooler lines to the engine accessory case with steel elbows. This amendment is prompted by two reports of cracks that were discovered in aluminum elbows. The actions specified in this AD are intended to prevent failure of either the 45 deg. or 90 deg. aluminum elbows that connect the oil lines from the oil cooler to the engine accessory case, which would cause loss of engine oil, resulting in an engine failure and a subsequent forced landing.
Which aircraft AD 98-05-10 applies to
Applies to R44 helicopters with aluminum (blue-colored) oil-cooler-to-engine-accessory-case elbows AN823-8D (45 deg.) or MS20822-8D (90 deg.); requires replacement with airworthy steel elbows MS20823-8 (45 deg.) or MS20822-8 (90 deg.), per Robinson R44 SB-25 dated Oct 1, 1997 (referenced, not incorporated). Compliance within 50 hours TIS after effective date (March 18, 1998).
Whether AD 98-05-10 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.