Commonwealth legislation

AD/PC-12/11 - Flap System - Alternate Flap Capability Removal

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This airworthiness directive requires Pilatus PC-12 aircraft (MSN 101–227 and 232) to have the ALTERNATE FLAP switch removed, a blanking plate fitted, a FLAP MAINT switch installed, and temporary revisions inserted into the flight and maintenance manuals according to Pilatus Service Bulletin No. 27‑004. Compliance is required within 30 days of 4 November 1998. The cost and work fall to the aircraft owners/operators, and the change removes crew access to the alternate flap control while a reliability fix is developed to address reported misuse.

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-12/11 - Flap System - Alternate Flap Capability Removal.

AD/PC-12/11 - Flap System - Alternate Flap Capability Removal

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Pilatus PC-12 Series Aeroplanes

AD/PC-12/11 Flap System - Alternate Flap Capability Removal

13/98 DM

Applicability: Model PC12 and PC12/45 aircraft with Manufacturer’s Serial Numbers (MSN) 101 to 227 (incl) and 232.

Requirement: 1. Remove the ALTERNATE FLAP switch from the centre console in the cockpit and replace with a blanking plate in accordance with Pilatus Service Bulletin No. 27-004 dated 15 September 1998.

2. Install a FLAP MAINT switch in accordance with Pilatus Service Bulletin No. 27- 004 dated 15 September 1998.

3. Insert appropriate Pilatus Temporary Revisions into Pilot’s Operating Handbook and Aircraft Maintenance Manual in accordance with Pilatus Service Bulletin No. 27-004 dated 15 September 1998.

Note: FOCA AD HB 98-352 dated 28 September 1998 refers.

Compliance: Within 30 days of the effective date of this directive.

This Airworthiness Directive becomes effective on 4 November 1998.

Background: Investigations of accidents and operating techniques around the world have revealed that operating crews are misusing the Alternate Flaps system on the PC12 aircraft.

FOCA has decided to remove the system from the centre console of the cockpit pending the issue of modifications to improve the reliability of the automatic PC12 flap system.

Source text

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

1 AD/PC-12/11 - Flap System - Alternate Flap Capability Removal