Commonwealth legislation

AD/SF340/71 - Engine Control Quadrant - Inspection of Flight Idle Stop Solenoid Bracket Screw

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Requires operators of SAAB SF340 aeroplanes (specified serial ranges, excluding certain control‑quadrant part numbers) to inspect two screws on the engine control quadrant per SAAB Service Bulletin and, if necessary or by a later deadline, replace the quadrant with a modified serviceable unit. This matters because backed‑out or missing screws can bind power levers and cause the Flight Idle Stop to malfunction. Operators pay for inspections and replacements; compliance is scheduled (every 800 flight hours) and replacement is required within 8,000 flight hours or six years unless a fault is found earlier.

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Direct links to the current provisions in AD/SF340/71 - Engine Control Quadrant - Inspection of Flight Idle Stop Solenoid Bracket Screw.

AD/SF340/71 - Engine Control Quadrant - Inspection of Flight Idle Stop Solenoid Bracket Screw

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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SAAB SF340 Series Aeroplanes

AD/SF340/71 Engine Control Quadrant - Inspection of

Flight Idle Stop Solenoid Bracket Screw

9/99

Applicability: Engine Control Quadrants fitted to SAAB Model SF340A aircraft serial numbers 004 through 159 and SAAB Model 340B aircraft, serial numbers 160 through 459.

Control Quadrants with the following part number and reference letters are NOT applicable:

Part Number Reference Letter

53082 F

53162 C

53170 D

53210 A

Requirement: 1. Inspect two screws in the Control Quadrant as specified in SAAB Service Bulletin SAAB 340-76-043 dated 02 July 1999.

Replace the Engine Control Quadrant with a serviceable, modified item.

Note: LFV Airworthiness Directive 1-143 dated 02 July 1999 refers.

Compliance: 1. Within 800 flight hours of the effective date of this Directive and thereafter every 800 flight hours (if no fault found).

Either, when loose screws are found during the inspection at 1. above, or, within 8000 flight hours, or six years, whichever is the sooner, after the effective date of this Directive.

Fitment of a serviceable modified control quadrant is closing action for this Directive. This Airworthiness Directive becomes effective on 9 September 1999.

Background: An operator has reported a problem with the LH Power Lever binding and not going into reverse after landing. The investigation showed that a screw had backed out of a cam and caused binding within the Control Quadrant. Locking compound had not been applied during installation and it was subsequently discovered that another screw in the assembly was also missing locking compound. Loose screws could cause the power levers to become restricted in movement aft of Flight Idle and the Flight Idle Stop will malfunction.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/SF340/71 - Engine Control Quadrant - Inspection of Flight Idle Stop Solenoid Bracket Screw