Commonwealth legislation

AD/PC-12/41 - Generator Control Unit

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Requires owners/operators of Pilatus PC‑12 and PC‑12/45 (MSN 101–507) with the second‑battery factory option to remove Generator Control Unit (GCU) P/N 988.21.15.102, install GCU P/N 988.21.15.103 per Pilatus SB 24‑022, and forbids reinstalling the old GCU. The replacement must occur at the next 100‑hour or annual inspection, or within 90 days. Costs and compliance fall on aircraft owners/operators; CASA enforces timing and installation standards (Applicability; Requirement; Compliance).

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/PC-12/41 - Generator Control Unit.

AIRWORTHINESS DIRECTIVE

View image in the official source

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

View image in the official source

Pilatus PC-12 Series Aeroplanes

AD/PC-12/41 Generator Control Unit 6/200

AD/PC-12/41 Generator Control Unit 6/2004

Applicability: All PC-12 and PC-12/45 airplanes, Manufacturer Serial Numbers (MSN) 101 through 507 with the second battery factory option and which do not have Generator Control Unit (GCU) part number (P/N) 988.21.15.103 installed.

Requirement: 1. Remove GCU P/N 988.21.15.102 and install GCU P/N 988.21.15.103 in accordance with the Accomplishment Instructions of Pilatus PC-12 Service Bulletin (SB) No. 24-022 dated 13 June 2003.

Note 1: The following Service Bulletins should be accomplished before or at the same time as PC-12 SB No. 24-022, as applicable:

PC-12 SB 24-010 Revision 1 dated 06 October 2003.

\- When an Electrosystems generator P/N 978.87.24.121 is installed.

PC-12 SB 24-019 Revision 1 dated 06 June 2003.

\- When an Electrodelta voltage regulator P/N 988.21.15.101 is installed. (This SB changes the P/N of the GCU to 988.21.15.103.)

2. GCUs with P/N 988.21.15.102 may not be installed as a replacement part on any aeroplane with the second battery factory option installed.

Note 2: FOCA (Switzerland) AD HB-2004-101 refers.

Compliance: For Requirement 1 - At the next 100 hour or annual inspection, but no later than 90 days after the effective date of this Directive.

For Requirement 2 - As of the effective date of this Directive. This Airworthiness Directive becomes effective on 10 June 2004.

Background: The Swiss Federal Office for Civil Aviation (FOCA) has received reports of incidents on PC-12 series aeroplanes with the second battery installation where the 2nd battery was discharged due to loss of the 2nd generator output, without any failure being indicated.

Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE