Airworthiness Directive · Amendment 39-13856 · Pilatus Aircraft Ltd. Model PC-7 Airplanes
Pilatus Aircraft Ltd. Model PC-7 Airplanes
This AD affects Model PC-7 airplanes, serial numbers 101 through 618, that are:
(1) equipped with Lear Romec RR53710B type or Lear Romec RR53710K fuel booster pump, Pilatus part number (P/N) 968.84.11.401; 968.84.11.403; or 968.84.11.404; and
(2) certificated in any category.
The FAA adopts a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. (Pilatus) Model PC-7 airplanes with any Lear Romec RR53710B type or Lear Romec RR53710K fuel booster pump (Pilatus part number 968.84.11.401; 968.84.11.403; or 968.84.11.404) installed. This AD requires you to check the airplane logbook to determine whether any installed fuel booster pump has been modified with spiral wrap to protect the wire leads and has the suffix letter "B" added to the serial number of the fuel booster pump identification plate. If any installed fuel booster pump has not been modified, you are required to inspect any installed fuel booster pump wire lead for defects; if defects are found, replace the fuel booster pump with a modified fuel booster pump with spiral wrap that protects the wire leads; or if no defects are found, install spiral wrap to protect any wire leads and add the suffix letter "B" to the serial number of the fuel booster pump identification plate. The pilot is allowed to do the logbook check. If the pilot can positively determine that the fuel booster pump wire leads with spiral wrap are installed following the service information and that the suffix letter "B" is included in the serial number of the fuel booster pump identification plate, no further action is required. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. We are issuing this AD to detect and correct any defects in the leads of any fuel booster pump, which could result in electrical arcing. This failure could lead to a fire or explosion in the fuel tank.
To address this problem, you must do the following:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) Check the airplane logbook to to ensure that any fuel booster pump (part number (P/N) 968.84.11.401; 968.84.11.403; or 968.84.11.404) has been modified with spiral wrap to protect the wire leads and has the suffix letter “B” added to the serial number of the fuel booster pump identification plate as required by paragraph (e)(5) of this AD | Within 50 hours time-in-service (TIS) after December 27, 2004 (the effective date of this AD), unless already done | The owner/operator holding at least a private pilot certificate as authorized by section 43.7 of the Federal Aviation Regulations (14 CFR 43.7) may perform this check. |
| (2) If you can positively determine that any fuel booster pump (P/N 968.84.11.401; 968.84.11.403; or 968.84.11.404) has been modified following the Accomplishment Instructions—Aircraft section in Pilatus PC-7 Service Bulletin No. 28-009, dated October 6, 2003, and has the suffix letter “B” added to the serial number of the fuel booster pump identification plate as required by paragraph (e)(5) of this AD, then no further action is required | Not Applicable | Make logbook entry. |
| (3) Inspect any fuel booster pump (P/N 968.84.11.401; 968.84.11.403; or 968.84.11.404) leads for any defects | Within 50 hours TIS after December 27, 2004 (the effective date of this AD), unless already done | Follow the Accomplishment Instructions—Aircraft section in Pilatus PC-7 Service Bulletin No. 28-009, dated October 6, 2003. This subject is also addressed in the Pilatus PC-7 Airplane Maintenance Manual. |
| (4) If any defect is found during the inspection required by paragraph (e)(3) of this AD, replace the fuel booster pump | Before further flight after the inspection required by paragraph (e)(3) of this AD in which any defect is found | Follow the Accomplishment Instructions—Aircraft section in Pilatus PC-7 Service Bulletin No. 28-009, dated October 6, 2003. This subject is also addressed in the Pilatus PC-7 Airplane Maintenance Manual. |
| (5) If no defects are found during the inspection required by paragraph (e)(3) of this AD, modify any fuel booster pump (P/N 968.84.11.401; 968.84.11.403; or 968.84.11.404) by installing the lead inspection by using a spiral wrap. After doing the modification, re-identify the fuel booster pump (P/N 968.84.11.401; 968.84.11.403; or 968.84.11.404) by adding the suffix letter “B” to the serial number of the fuel booster pump identification plate | Before further flight after the inspection required by paragraph (e)(3) of this AD where no defect is found | Follow the Accomplishment Instructions—Aircraft section in Pilatus PC-7 Service Bulletin No. 28-009, dated October 6, 2003. This subject is also addressed in the Pilatus PC-7 Airplane Maintenance Manual. |
| (6) Do not install any fuel booster pump (P/N 968.84.11.401; 968.84.11.403; or 968.84.11.404) that has not been modified and identified with the suffix letter “B” to the serial number of the fuel booster pump identification plate | As of December 27, 2004 (the effective date of this AD) | Follow the Accomplishment Instructions—Spares section in Pilatus PC-7 Service Bulletin No. 28-009, dated October 6, 2003. |
Note 1: The FAA recommends that you incorporate Pilatus PC-7 Maintenance Manual No. 28-20-03, dated November 30, 2003, and Pilatus PC-7 Maintenance Manual No. 12-10-01, dated November 30, 2003, in the appropriate section of the airplane maintenance manual.
Note 2: Wiring defects are addressed in paragraph 11-97 in FAA Advisory Circular (AC) 43.13-1B.
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.
Aircraft
