AIRWORTHINESS DIRECTIVE

CAA-AD-112/2001R1

Supersedes CAA-AD-112/2001

Date of issue: June 25, 2002

HELICOPTER - TAIL SERVOCONTROL (ATA 67) - INSPECTION

Applicability: AS 355 helicopters, versions: E, F, F1, F2 and N equipped with tail servocontrols, all part numbers that have not been modified per MOD 073139 or per EUROCOPTER AS 355 Service Bulletin No 67.00.22.

Effective date: Upon receipt

Compliance : Required as indicated in DGAC AD 2001-581-063(A) R1.

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.: 2001-581-063(A) R1

EUROCOPTER

AS 355 helicopters

Tail Servocontrol - Eye end fitting locking (ATA 67)

1. EFFECTIVITY:

AS 355 helicopters, versions: E, F, F1, F2 and N equipped with tail servocontrols, all part numbers that have not been modified per MOD 073139 or per EUROCOPTER AS 355 Service Bulletin No 67.00.22.

2. REASONS:

This Airworthiness Directive (AD) is issued following a report of uncoupling of the eye end fitting from the tail servocontrol rod during on a cruise flight due to incorrect locking.

If this situation were not corrected, it would lead to the progressive reduction of the yaw control range and finally cause the loss of the servocontrol assistance.

The purpose of Revision 1 is to restrict the effectivity of this AD by excluding tail servocontrols which have been modified per MOD 073139.

3. MANDATORY ACTIONS AND COMPLIANCE TIME:

From the effective date of the original issue of this AD, check the eye end fitting-to-servocontrol coupling for correct locking in compliance with the instructions described in paragraph 2.A of referenced EUROCOPTER AS 355 Alert Service Bulletin (ASB) No. 05.00.36 according to the following conditions:

3.1. Aircraft that have logged more than 500 flight hours:

The check has to be carried out no later than within the next 50 flight hours, then every 550 flight hours.

3.2. Aircraft that have logged less than 500 flight hours:

The check has to be carried out at the latest at 550 flight hours, then every 550 flight hours.

3.3. Interpretation of the results of the checks and following actions:

- If no play is found and if the lockwasher is correctly positioned, no action is required before resuming flights.

- If a play is found and/or if the lockwasher is not correctly positioned, bring the installation up to standard before resuming flights by complying with the instructions described in paragraph 2.B of referenced ASB.

REF.: EUROCOPTER AS 355 Alert Service Bulletin No. 05.00.36.

This Revision 1 replaces original AD 2001-581-063(A) dated November 28, 2001

EFECTIVE DATES:

Original AD: On receipt from NOVEMBER 28, 2001

Revision 1 : JUNE 22, 2002