Airworthiness Directive · Amendment 39-16907 · Landing gear
Saab AB, Saab Aerosystems Airplanes
This AD applies to Saab AB, Saab Aerosystems Model 340A (SAAB/SF340A) and SAAB 340B airplanes, all serial numbers, certificated in any category.
We are superseding an existing airworthiness directive (AD) for all Saab AB, Saab Aerosystems Model 340A (SAAB/SF340A) and SAAB 340B airplanes. That AD currently requires an inspection of the main landing gear (MLG) separation bolt harness for broken wires and corroded connectors, and corrective actions if necessary; and for certain airplanes, a modification of the MLG separation bolt's electrical harness. This new AD requires replacement of the separation bolt harness. This AD was prompted by reports of broken wires and corroded connectors in the SAAB 340 MLG emergency release system. We are issuing this AD to prevent improper release of the MLG during an emergency situation, possibly resulting in damage to the airplane during landing and injury to the occupants.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 3 months after July 29, 2004 (the effective date of AD 2004-12-03, Amendment 39-13662 (69 FR 35235, June 24, 2004)), perform an inspection of the MLG's separation bolt harness for broken wires and corroded connectors, and any applicable corrective actions by doing all of the actions, in accordance with the Accomplishment Instructions of Saab Service Bulletin 340-32-127, dated December 18, 2002; or Revision 01, dated January 23, 2003. Perform the inspection/corrective actions in accordance with Saab Service Bulletin 340-32-127, dated December 18, 2002; or Revision 01, dated January 23, 2003. Perform any applicable corrective actions before further flight.
For Model SAAB SF340A series airplanes: Within 12 months after July 29, 2004, do the actions specified in table 1 of this AD, as applicable.
| For airplanes with serial numbers— | Accomplish all actions associated with— | According to the accomplishment instructions of— |
|---|---|---|
| 004 through 108 inclusive | Modifying the MLG separation bolt's electrical harness | Saab Service Bulletin 340-32-041, Revision 01, dated October 9, 1987. |
| 004 through 078 inclusive | Modifying the MLG separation bolt's electrical harness | Saab Service Bulletin 340-32-028, Revision 01, dated November 25, 1986. |
Within 12 months after the effective date of this AD: Replace the separation bolt harnesses having part number (P/N) 7292520-678 with separation bolt harnesses having P/N 7292520-691, in accordance with the Accomplishment Instructions of Saab Service Bulletin 340-32-139, Revision 01, dated November 1, 2010.
As of the effective date of this AD, no person may install a separation bolt harness having P/N 7292520-678, on any airplane.
Actions done before the effective date of this AD in accordance with Saab Service Bulletin 340-32-139, dated January 12, 2010, are acceptable for compliance with the requirements of paragraph (i) of this AD.
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
