Airworthiness Directive · Amendment 39-14704 · 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
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
This AD applies to 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 in the following Table 1:
| -B15A |
| -B15E |
| -B15G |
| -B17 |
| -B17B |
| -B17C |
| -B17D |
| -B17E |
| -B17F |
| -B17F/1 |
| -B17F/2 |
| -C10 |
| -C10B |
| -C10D |
| -C18 |
| -C18A |
| -C18B |
| -C18C |
| -C20 |
| -C20B |
| -C20C |
| -C20F |
| -C20J |
| -C20R |
| -C20R/1 |
| -C20R/2 |
| -C20R/4 |
| -C20S |
| -C20W |
| -C28 |
| -C28B |
| -C28C |
| -C30 |
| -C30G |
| -C30G/2 |
| -C30M |
| -C30P |
| -C30R |
| -C30R/1 |
| -C30R/3 |
| -C30R/3M |
| -C30S |
| -C30U |
| -C40B |
| -C47B |
| -C47M |
These engines are installed on, but not limited to, the aircraft listed in the following Table 2:
| Manufacturer | Model |
|---|---|
| AeroSpace Technologies of Australia Pty Ltd | N22B, N22S, and N24A. |
| Agusta | A109, A109A, A109AII, and A109C. |
| Arrow Falcon Exporters | OH-58A, OH-58A+, and OH-58C. |
| Bell Helicopter Textron | 206A, 206A-1, 206B, 206L, 206L-1, 206L-3, 206L-4, 230, 407, and 430. |
| B-N Group | BN-2T and BN-2T-4R. |
| Enstrom Helicopter | TH28, 480; and 480B. |
| Eurocopter Canada Limited | BO 105 LS A-3. |
| Eurocopter Deutschland | BO-105A, BO-105C, BO-105LS A-1, and BO-105S. |
| Eurocopter France | AS355E, AS355F, AS355I, and AS355F2. |
| FH-1100 Manufacturing Corporation | 100, 420, and MX-7-420A. |
| Garlick Helicopters | OH-58A, OH-58A+, OH-58C; Maule zm-7-420A, MT-7-420, MX-7-420, MX-7-420A. |
| MD Helicopters Inc | 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N. |
| San Joaquin Helicopters | OH-58A, OH-58A+, and OH-58C. |
| Schweizer | TH269D. |
| SIAI Marchetti s.r.l | SF600 and SF600A. |
| Sikorsky Aircraft Corporation | S-76A. |
| Vulcanair S.p.A | AP68TP 300, and AP68TP 600. |
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.
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done.
(f) Perform a onetime inspection of the screens in fuel nozzles as follows:
(1) For fuel nozzles with a P/N listed in Table 3 of this AD, inspect the screen for contamination within 50 operating hours after the effective date of this AD.
| Manufacturer | P/N | Corresponding RRC vendor P/N |
|---|---|---|
| RRC | 6874959 6894610 6898531 | 5232815 5233465 5233585 |
| Goodrich Delavan (Parts Manufacturer Approval (PMA)) | 47069 47101 49445 | N/A N/A N/A |
(2) For fuel nozzles with a P/N listed in Table 4 of this AD, inspect the screen for contamination within 150 operating hours after January 5, 2005.
| Manufacturer | P/N | Corresponding RRC vendor P/N |
|---|---|---|
| RRC | 6852020 6890917 6899001 | 5232480 5233333 5233600 |
(g) If you find contamination on the screen, inspect and clean the entire aircraft fuel system before further flight.
(h) At the next fuel nozzle overhaul after the effective date of this AD, do the following:
(1) Remove from service fuel nozzles listed in Table 3 and Table 4 of this AD.
(2) Replace with a serviceable fuel nozzle.
(i) For the purposes of this AD, a serviceable fuel nozzle is defined as a nozzle that has a P/N not specified in, or addressed by, this AD.
Previous credit is given for onetime inspections of fuel nozzles, RRC P/Ns 6852020, 6890917, and 6899001 using AD 2004-24-09.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
