Airworthiness Directive · Amendment 39-15444 · Fuel
Saab Model SAAB-Fairchild SF340A (SAAB/SF340A) and SAAB 340B Airplanes
This AD applies to Saab Model SAAB-Fairchild SF340A (SAAB/SF340A) and SAAB 340B airplanes, all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Within 72 months after the effective date of this AD, unless already done, perform Modification No. 3164 (right-hand wing) and Modification No. 3165 (left-hand wing) in accordance with Saab Service Bulletin 340-28-026, dated July 5, 2007. The modifications include the following actions.
(1) Removal of the fuel pumps 5QM and 6QM, the fuel switches 31EB, 32EB, 9QA, 10QA, 11QA, and 12QA, the refuel shutoff valves 15QA and 16QA, and the optical sensors/mechanical switches 13QA and 14QA.
(2) Inspection of the wiring to the fuel pumps, fuel level switches, the refuel shutoff valves, and optical sensors/mechanical switches, and if any damage is found, contact Saab for repair instructions and repair before further flight.
(3) Twisting of the fuel pump wiring, fuel level switches wiring, refuel shutoff valves wiring, and optical sensors/mechanical switches wiring.
(4) Installation of a shrinkable tube to the fuel pumps wiring, fuel level switches wiring, refuel shutoff valves wiring and optical sensors/mechanical switches wiring.
(5) Installation of fuel pumps, the fuel level switches, the refuel shutoff valves, and the optical sensors/mechanical switches.
(6) Operational and functional test of the fuel measuring/indicating system.
Note: This AD differs from the MCAI and/or service information as follows: (1) The MCAI does not specify corrective action for the inspection specified in paragraph (f)(2) of this AD. This AD requires contacting Saab for repair instructions and repairing before further flight. (2) The MCAI does not include actions for optical sensors/mechanical switches 13QA and 14QA; however, paragraph (f) of this AD includes modification of those optical sensors/mechanical switches.
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
