Commonwealth legislation

AD/BEECH 400/7 - Wheel Speed Transducer Drive Clip

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Commonwealth

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legislative instrument

Plain English Summary

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This airworthiness directive requires replacing or reworking the main landing-gear hubcaps so the wheel-speed transducer drive clip engages correctly (new or reworked hubcap P/N 140‑03121‑1), and adding a maintenance procedure to inspect the drive-clip gap (≤0.20 inch / 5 mm) each time a hubcap is removed. It applies to Beech 400A serials RK‑1–RK‑76 (including RK‑1–RK‑23 with the increased landing-weight kit).

Compliance is within 25 flight hours after 27 April 1994 or by 27 May 1994. The AD responds to a reported loss of anti-skid braking and aims to prevent marginal engagement.

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AD/BEECH 400/7 - Wheel Speed Transducer Drive Clip

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Beechcraft 400 Series Aeroplanes

AD/BEECH 400/7 Wheel Speed Transducer Drive Clip 6/94

Applicability: Model 400A aircraft with serial numbers RK-1 through RK-23, on which Beechcraft Kit No. 128-8001-1S (increased landing weight modification) is installed; and aircraft with serial numbers RK-24 through RK-76.

Requirement: 1. Replace the existing left and right hand hubcaps on the main landing gear with new hubcaps, part number 140-03121-1; or rework the existing hubcaps by adding a spacer between the hubcap drive clip and the hubcap and reidentifying the hubcap assembly as part number 140-03121-1; in accordance with Beechcraft Service Bulletin 2549.

Incorporate into the System of Maintenance for the aircraft, the procedure described in Beechcraft Service Bulletin 2549; for inspecting the transducer drive clip to ensure that the drive clip gap does not exceed 0.20 inch (5 mm), which must be accomplished each time a hubcap is removed.

Note 1: FAA AD 94-04-07 Amdt 39-8827 refers.

Note 2: Requirement 2 of this Directive will require approval in accordance with CAR 42M.

Compliance: Within 25 hours’ time in service after 27 April 1994, or prior to 27 May 1994, whichever occurs first.

Background: The FAA received a report that a Beech 400A aircraft lost its anti-skid braking system during landing roll out. Tests and inspections of the brakes and anti-skid system have revealed that only marginal engagement may occur between the main wheel hubcap drive clip and the anti-skid wheel speed transducer.

Source text

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

1 AD/BEECH 400/7 - Wheel Speed Transducer Drive Clip