Commonwealth legislation

AD/BEECH 90/87 - Engine Mount Assembly Attachment Bolts

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Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Requires owners/operators of Beechcraft 90 and 65‑90 series aeroplanes to remove each engine truss‑to‑firewall bolt (one at a time), identify bolts manufactured by Dumont Aviation per Beech SB 2432, and replace any such bolts with part MS20006‑20/M. Inspection must occur within 150 flight hours after 17 September 1992; replacement before further flight. Operators pay for the inspection and replacement and must follow Beech SB 2432 identification procedures.

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AD/BEECH 90/87 - Engine Mount Assembly Attachment Bolts

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Beechcraft 90 and 65-90 (King Air) Series Aeroplanes

AD/BEECH 90/87 Engine Mount Assembly Attachment Bolts 10/92

Applicability: Models and serial numbers as listed in Beech SB 2432.

Requirement: 1. Individually remove each engine truss-to-firewall bolt and determine whether the bolt is manufactured by Dumont Aviation as specified by Figure 2 of, and in accordance with paragraphs 1 and 2 of the ACCOMPLISHMENT INSTRUCTIONS section of Beech SB 2432. Only one engine truss-to-firewall bolt shall be removed at any given time.

Replace any bolt manufactured by Dumont Aviation as identified in Requirement 1 of this Directive with a new bolt part number MS20006-20 /M/.

Note: FAA AD 92-15-01 Amdt 39-8294 refers.

Compliance: 1. Within 150 hours’ time in service after 17 September 1992.

Prior to further flight.

Background: This Directive requires a one-time visual inspection of all engine mount assembly attachment bolts to determine whether bolts that could have been improperly heat treated are installed, and replacement of any such bolts.

Source text

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

1 AD/BEECH 90/87 - Engine Mount Assembly Attachment Bolts