Federal Register of Legislation
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES
AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series
AD/TPE 331/52 PT2 Sensor Icing 11/97
Applicability: TPE331-3, -5, -6, -10, -11, -12 series engines not incorporating a Pt2 sensor modified in accordance with AlliedSignal Service Bulletins (SB) TPE331-73-0235 or TPE331- 73-0236 as applicable by engine model.
Requirement: 1. All applicable aircraft:
To prevent the loss of control of engine power when operating in icing conditions, modify the Pt2 sensor in accordance with the requirements of AlliedSignal SB TPE331-73-0235 or TPE331-73-0236 as applicable by engine model number.
2. Aircraft equipped with engine inlet ice protection:
To address the possible loss of control of engine power when operating in icing conditions; pending the issue of an amendment to the Approved Flight Manual, a copy of this directive shall be placed in the Approved Flight Manual as the first page of the emergency or abnormal procedures section to reflect:
"NON RESPONSIVE POWER LEVER:
If a lack of response to power lever is observed, turn on the ignition and anti-ice for both engines. After the condition has cleared and normal operations are observed, which occurs in approximately three minutes, anti-ice and ignition can be turned off."
Note 1: Compliance with the requirements of SB TPE331-73-0235 or TPE331-73- 0236 constitutes a terminating action for the requirements of this directive.
Note 2: FAA Airworthiness Directive 97-15-10 refers.
Compliance: 1. As detailed in the requirement documents.
2. Within 30 days from the effective date of this directive.
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