AIRWORTHINESS DIRECTIVE
CAA-AD-040/1999
Date of issue: April 03, 1999
HELICOPTER - 3 - WAY COUPLING VALVE - INSPECTION
Applicability: AS 355 helicopters, versions E, F, F1, F2 and N.
Effective date:May 20, 1999
Compliance : Required as indicated in DGAC AD 1999-083-056(A).
Remarks: Where applicable, the requirements of this AD must be integrated into the Aircraft´s Logbook(s). Address inquiries concerning this AD to: Civil Aviation Authority, Airworthiness Division, Ruzyne Airport, 160 08 Prague 6, Czech Republic, tel: 420 2 324086, fax: 420 2 364112.
Ing. Pavel MATOUŠEK
Director of Airworthiness Division CAA CZ
EUROCOPTER
AS 355 Helicopters
P2 system 3-way coupling
1. EFFECTIVITY
AS 355 helicopters, versions E, F, F1, F2 and N.
2. REASON
This Airworthiness Directive is issued subsequent to the discovery in operation of some cases of failure of the P2 system 3-way coupling valve, which can lead to a reduction in available engine power and change the performance characteristics of the helicopter.
3. MANDATORY ACTIONS AND COMPLIANCE TIME
The following actions are rendered mandatory :
3.1. Before the first flight, following the effective date of this Airworthiness Directive, insert the appropriate rush revision referenced below in each flight manual (date code 99-03).
3.2. Insert the appropriate normal revision in each flight manual, with the identical number of the rush revision referenced below, within one month following receipt of the normal revision and then, remove the rush revision inserted in accordance with paragraph 3.1. above.
Reference : Aircraft Flight Manuals, Rush Revisionç,: date code 99-03 :
RR 7E (AS 355 E)
RR 6D (AS 355 F)
RR 5E (AS 355 F1 )
RR 4D (AS 355 F2)
RR 6A (AS 355 N)
EFFECTIVE DATE :
On receipt from FEBRUARY 24,1999
EUROCOPTER
February 24,1999 AS 3 50Helicopters 1999-083-056(A)