AIRWORTHINESS DIRECTIVE

CAA-AD-067/2002

Date of issue: June 25, 2002

HELICOPTER – “TRW-SAMM” MAIN SERVOCONTROLS (ATA 67) – INSPECTION

Applicability: AS 355 helicopters, versions F, F1, F2 and N equipped with “TRW-SAMM" main servocontrols P/No.: SC 8042 or SC 8043 which underwent their last complete overhaul or repair since overhaul at "HAWKER PACIFIC AEROSPACE", USA, before March 1, 2002.

Effective date: August 08, 2002.

Compliance : Required as indicated in DGAC AD 2002-315-069(A).

Remarks:. The compliance of this AD must be recorded in Aircraft Logbook, where applicable the requirements of this AD must be integrated into Aircraft Technical Documentation. Address inquiries concerning this AD to: Civil Aviation Authority, Airworthiness Division, Ruzyne Airport, 160 08 Prague 6, Czech Republic, tel: 420 2 33320922, fax: 420 2 20562270

Ing. Pavel MATOUŠEK
Director of Airworthiness Division
CAA CZ

DGAC AD No:.2002-315-069(A)

EUROCOPTER

AS 355 helicopters

"TRW-SAMM" Main Servocontrols (ATA 67)

1. EFFECTIVITY

AS 355 helicopters, versions F, F1, F2 and N equipped with “TRW-SAMM" main servocontrols P/No.: SC 8042 or SC 8043 which underwent their last complete overhaul or repair since overhaul at "HAWKER PACIFIC AEROSPACE", USA, before March 1, 2002.

2. REASONS

This Airworthiness Directive (AD) is issued following a report of incorrect tightening torque load found in service on servocontrols overhauled by "HAWKER PACIFIC AEROSPACE" installed on SA 366 G1 helicopters on the end-fitting that attaches the servocontrol cylinder to the upper ball end-fitting. This anomaly might lead to thread failure and separation of the upper end-fitting and result in the loss of the control of the helicopter.

3. MANDATORY ACTIONS

Remove the servocontrols and return them to "HAWKER PACIFIC AEROSPACE" for a check of the thread condition and application of the tightening torque as per CMM, in compliance with the instructions described in paragraph 2 of referenced EUROCOPTER AS 355 Alert Telex No. 67.00.23.

4. COMPLIANCE TIME

4.1. For servocontrols that have been in service for less than 1,000 flight hours at the effective date of this AD:

The actions defined in paragraph 3 above are to be taken no later than within the next 550 flight hours or within the next 12 months (whichever limit is reached first) from the effective date of this AD.

4.2. For servocontrols that have been in service for 1,000 flight hours or more than 1.000 flight hours and less than 1,300 flight hours at the effective date of this AD:

The actions defined in paragraph 3 above are to be taken at the latest at 1,550 flight hours or within the next 9 months (whichever limit is reached first) from the effective date of this AD.

4.3. For servocontrols that have been in service for 1,300 flight hours or more than 1,300 flight hours at the effective date of this AD:

The actions defined in paragraph 3 above are to be taken no later than within the next 250 flight hours or within the next 6 months (whichever limit is reached first) from the effective date of this AD.

4.4. For servocontrols held as spares:

The actions defined in paragraph 3 above are to be taken before installation on aircraft.

REF.: EUROCOPTER AS 355 Alert Telex No. 67.00.23.

EPFECTIVE DATE :

On receipt from JUNE 12, 2002