TailplateTailplate
Run a report

Airworthiness Directive E6-12420

one-time
AD E6-12420 · 2006-08-03 · turboshaft engine

Airworthiness Directives; Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) (RRC) 250-B and 250-C Series Turboshaft and Turboprop Engines

What this AD requires

The FAA is superseding an existing airworthiness directive (AD) for RRC 250-B and 250-C series turboshaft and turboprop engines. That AD currently requires a onetime inspection of the fuel nozzle screen for contamination, and if contamination is found, inspection and cleaning of the entire aircraft fuel system before further flight. That AD also requires replacing the fuel nozzle with a new design fuel nozzle, at the next fuel nozzle overhaul or by June 30, 2006, whichever occurs first. This AD requires the same actions, but would add additional part numbers (P/Ns) to the list of affected fuel nozzles. This AD would also explain that the existing AD, as worded, allows certain part number (P/N) fuel nozzles back into service. Those fuel nozzles must not be allowed back into service. This AD is prompted by the discovery that several P/Ns of fuel nozzles were inadvertently left out of AD 2004-24-09. We are issuing this AD to minimize the risk of sudden loss of engine power and uncommanded shutdown of the engine due to fuel contamination and collapse of the screen in the fuel nozzle.

Which aircraft AD E6-12420 applies to

MakesRolls-Royce Corporation
Models250-B15A, 250-B15E, 250-B15G, 250-B17, 250-B17B, 250-B17C, 250-B17D, 250-B17E, 250-B17F, 250-B17F/1, 250-B17F/2, 250-C10, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C20, 250-C20B, 250-C20C, 250-C20F, 250-C20J, 250-C20R, 250-C20R/1, 250-C20R/2, 250-C20R/4, 250-C20S, 250-C20W, 250-C28, 250-C28B, 250-C28C, 250-C30, 250-C30G, 250-C30G/2, 250-C30M, 250-C30P, 250-C30R, 250-C30R/1, 250-C30R/3, 250-C30R/3M, 250-C30S, 250-C30U, 250-C40B, 250-C47B, 250-C47M, 250

AD's Table 1 covers both 250-B series turboprop and 250-C series turboshaft variants (formerly Allison/Detroit Diesel Allison); installed on aircraft/helicopters listed in Table 2, not limited to those listed.

Whether AD E6-12420 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

Supersession

Supersedes AD 2004-24-09.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.
Date — When the work was done.
Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.
Signature & certificate — The A&P/IA who returned it to service, with certificate number.
Is AD E6-12420 complied with on your aircraft?

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.