Airworthiness Directive 2003-17-11
one-timeAirworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Dart 528, 529, 529D, 531, 532, 535, 542, and 552 Series Turboprop Engines
What this AD requires
The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Deutschland Ltd & Co KG (RRD) (formerly Rolls-Royce plc) Dart 528-7E, 529-7H, -7E, -8E, -8H, -8X, -8Y, -8Z, 529D-7E, -7H, -8E, - 8H, -8X, -8Y, -8Z, 531, 532-2L, -7, -7N, -7P, -7L, -7R, 535-2, -7R, 542-4, -4K, -10, -10J, -10K, 552-2, 552-7, and -7R turboprop engines. This AD requires removal of any Sermetel coating (Omat 7/46) from certain high pressure (HP) turbine discs and intermediate pressure (IP) turbine discs, and inspection of discs after coating removal. This AD is prompted by reports of Sermetel coating (Omat 7/46) applied to certain turbine discs which, if allowed to remain on the discs would react adversely with the disc dry film lubricant, and could result in uncontained HP or IP turbine disc failure, resulting in possible damage to the airplane. We are issuing this AD to prevent uncontained HP or IP turbine disc failure, which could result in damage to the airplane.
Which aircraft AD 2003-17-11 applies to
Applies only to Dart series turboprop engines with a high pressure (HP) or intermediate pressure (IP) turbine disc whose serial number is listed in Table 1 of the AD; visible discs in this excerpt: DETN128 (HP stage 31), DETN155 (HP stage 22), DETN3541 (HP stage 17), DETN3542 (HP stage 16), LA759 (HP stage 27), LP219 (HP stage 23), LW376 (HP stage 21), LX484 (HP stage 22), LZ299 (HP stage 23), LZ404 (HP stage 13), LZ555 (HP stage 30), LZ564 (HP stage 15), SG612 (HP stage 20), SH195 (HP stage 16), DETN25 (IP stage 30); the table is truncated in the provided text and likely continues beyond these entries. Installed on, but not limited to, BAE Systems HS 748 Series 2A/2B, Fokker F.27 Mark 200/400/500/600, Gulfstream G-159, Maryland Air Industries F-7F/F-27A/F-27G/F-27J/F-27M/FH-227B/FH-227C/FH-227D/FH-227E, and Mitsubishi YS-11/YS-11A-200/-300/-500/-600 airplanes.
Whether AD 2003-17-11 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.