Commonwealth legislation

AD/BEECH 35/42 - Internally Lighted Altimeter

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This directive requires owners/operators of Beechcraft V35B Bonanzas (serials D9398–D9520 or any V35B that received internally lighted altimeters from Beechcraft Wichita between 9/1/1972–8/1/1973) to inspect altimeters for a specific locking‑screw position. If the screw indicates a fault, the altimeter must be replaced within 50 flight hours; otherwise pre‑flight checks (pushing and turning the adjustment knob) are required until replacement.

It matters because internally disengaging altimeters can give false altitude readings, creating a serious collision/terrain hazard.

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Current sections

Direct links to the current provisions in AD/BEECH 35/42 - Internally Lighted Altimeter.

AD/BEECH 35/42 - Internally Lighted Altimeter

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Beechcraft 35 (Bonanza) Series Aeroplanes

AD/BEECH 35/42 Internally Lighted Altimeter 10/73

Applicability: All models V35B with internally lighted altimeters supplied as spares ex-Beech Wichita between 1 September 1972 and 1 August 1973 and model V35B with S/Nos. D9398 to D9520.

Requirement: 1. Prior to next flight visually inspect the internally lighted altimeters. If the locking stud screw is located above and to the left of the barometric scale adjustment knob, no further inspection or replacement is necessary.

If the locking stud screw is located below, and to the right of the barometric adjustment knob, replace the instrument within 50 hours time in service after

17 October 1973. Until replacement is accomplished check the altimeter prior to each flight as follows:

Rotate barometric scale adjustment knob while applying outward finger pressure to ensure the elevation hands do not disengage from the barometric scale.

Disengagement will be readily recognised by the knob snapping outward and the elevation hands will not move when the barometric scale is rotated. If disengagement occurs, replace the altimeter with a 58-380045-3 millibars scale 35,000 feet altimeter, or an equivalent. All future altimeters will have locking stud screws above and to the left of the adjusting knob as in 1. above.

Note: Until replacement altimeters are installed forward pressure should be exerted on the knob whenever changing barometric settings.

Compliance: As detailed in the Requirement document.

Source text

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

1 AD/BEECH 35/42 - Internally Lighted Altimeter