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AD Number: CF-2015-01

Issue Date: 20 January 2015

AIRWORTHINESS DIRECTIVE

The following airworthiness directive (AD) may be applicable to an aircraft which our records indicate is registered in your name. ADs are issued pursuant to Canadian Aviation 

Regulation (CAR) 521 Division X. Pursuant to CAR 605.84 and the further details of CAR Standard 625, Appendix H, the continuing airworthiness of a Canadian registered aircraft is contingent upon compliance with all applicable ADs. Failure to comply with the requirements of an AD may invalidate the flight authorization of the aircraft. Alternative means of compliance shall be applied for in accordance with CAR 605.84 and the above-referenced Standard.

This AD has been issued by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport Canada, Ottawa, telephone 613 952-4357.

Number: CF-2015-01 Effective Date: 3 February 2015

ATA: 72/77 Type Certificate: E-20

Subject: Engine Indicating - Incorrect Engine Torque Indication

Replacement: Replaces European Aviation Safety Agency (EASA) AD 2014-0175, issued 25 July 2014.

Applicability: Pratt & Whitney Canada (P&WC) model PT6B-37A engines with pre-Service Bulletin (SB) 

39092 configuration and serial numbers:

PCE-PU0001, PU0004, PU0006, PU0008, PU0009, PU0010, PU0015, PU0016, PU0023, 

PU0025, PU0033, PU0034, PU0036 thru PU0055, PU0058 thru PU0063, PU0066, 

PU0068, PU0069, PU0070, PU0072 thru PU0087, PU0092, PU0096, PU0098, PU0099, 

PU0100, PU0101, PU0102, PU0105 thru PU0113, PU0121, PU0122, PU0125 thru 

PU0142, PU0144, PU0147 thru PU0161, PU0163 thru PU0167, PU0169 thru PU0209, 

PU0212, PU0213, PU0214, PU0216, PU0219 and PU0220.

Compliance: As indicated below, unless already accomplished.

Background: Five incidences of incorrect engine torque indication have been reported for PT6B-37A 

engine installations on AW119MKII helicopters. A lower than actual engine torque 

indication due to a faulty indication system, particularly on a helicopter being operated at 

max allowable torque (90 to 110%) range, may result in undetected over-torque condition. 

Repeated over torque conditions that are undetected and consequently are not corrected 

in accordance with conditional inspection requirements of original equipment 

manufacturer (OEM) Instructions for Continued Airworthiness (ICAs), may have a 

negative impact on the operational safety of the aircraft. Investigation by P&WC has 

determined the root cause of subject torque indication anomaly to be the axial migration 

of part number (P/N) 3310433-03 bearings at the engine torque sensing gear location.

To address the subject bearing migration problem, P&WC has issued SB 39095, which 

as an interim mitigating action requires periodic inspection of the #10 bearing, until such 

time as the subject P/N 3310433-03 bearings are removed from affected in-service 

engines in accordance with SB 39092. This AD is issued to mandate compliance with 

SB 39092R4 and SB 39095R3.

Corrective Actions:

Part I – All affected engines

Within 50 hours air time from the effective date of this AD, check affected engines for 

bearing P/N 3310433-03 installation at #10 bearing location in accordance with P&WC 

SB 39095R3 accomplishment instructions, dated 29 December 2014, or later revisions 

approved by the Chief, Continuing Airworthiness, Transport Canada.

If P/N 3310433-03 bearing is installed, before next flight, comply with the applicable 

Part II or Part III of this AD.

Pursuant to CAR 202.51 the registered owner of a Canadian aircraft shall, within seven days, notify the Minister 

in writing of any change of his or her name or address. 

For all changes to your mailing address, contact your TC Regional Aircraft Registration Office at 1-800-305-2059,

option 1 for English, 2 for Aircraft Registration and then select the appropriate region.

24-0022 (01-2005)
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Part II – For affected engines with 500 hours air time or less since new

Inspect bearing P/N 3310433-03 at #10 bearing location for axial migration, and rectify 

any noted discrepancy. Repeat the subject inspection for axial migration every 100 hours 

air time and once an engine has accumulated 500 hours air time, re-inspect every 200 

hours air time and rectify as required, in accordance with P&WC SB 39095R3 

accomplishment instructions, dated 29 December 2014, or later revisions approved by the 

Chief, Continuing Airworthiness, Transport Canada. 

Engines inspected in compliance with Required Action (1) of EASA AD 2014-0175, are 

considered compliant with initial inspection requirements of Part I, II and III of this AD.

Part III – For affected engines with more than 500 hours air time since new

Inspect bearing P/N 3310433-03 at #10 bearing location for axial migration, rectify any 

noted discrepancy and repeat the subject inspection for axial migration, every 200 hours 

air time and rectify as required, in accordance with P&WC SB 39095R3 accomplishment 

instructions, dated 29 December 2014, or later revisions approved by the Chief, 

Continuing Airworthiness, Transport Canada.

Part IV - Replacement of bearing P/N 3310433-03 at #9 and #10 bearing locations

A. For engine serial numbers: PCE-PU0192, PU0193, PU0201, PU0208, PU0209, 

PU0212, PU0213, PU0214, PU0216, PU0219 and PU0220 :

Within 450 hours air time or 42 months, whichever occurs first, from the effective date 

of this AD, verify and replace bearing P/N 3310433-03 at #9 and #10 bearing 

locations in accordance with P&WC SB 39092R4 accomplishment instructions, dated 

29 December 2014, or later revisions approved by the Chief, Continuing 

Airworthiness, Transport Canada.

B. For engine serial numbers: PCE-PU0001, PU0004, PU0006, PU0008, PU0009, 

PU0010, PU0015, PU0016, PU0023, PU0025, PU0033, PU0034, PU0036 thru 

PU0055, PU0058 thru PU0063, PU0066, PU0068, PU0069, PU0070, PU0072 thru 

PU0087, PU0092, PU0096, PU0098, PU0099, PU0100, PU0101, PU0102, PU0105 

thru PU0113, PU0121, PU0122, PU0125 thru PU0142, PU0144, PU0147 thru 

PU0161, PU0163 thru PU0167, PU0169 thru PU0191, PU0194 thru PU0200, 

PU0202 thru PU0207 :

Before 42 months, from the effective date of this AD, verify and replace bearing 

P/N 3310433-03 at #9 and #10 bearing locations in accordance with P&WC 

SB 39092R4 accomplishment instructions, dated 29 December 2014, or later 

revisions approved by the Chief, Continuing Airworthiness, Transport Canada.

Compliance with Part IV above constitutes the terminating action for this AD.

Compliance with earlier versions of SB 39092 prior to the effective date of this AD, meets 

the mandated requirement of Part IV of this AD.

Compliance with Required Actions (2) or (3) of EASA AD 2014-0175, meets the intent of 

Part IV requirement of this AD.

Authorization: For the Minister of Transport, 

ORIGINAL SIGNED BY

Philip Tang

Acting Chief, Continuing Airworthiness

Contact: A. K. Durrani, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 

613-996-9178 or e-mail AD-CN@tc.gc.ca or any Transport Canada Centre.