AIRWORTHINESS DIRECTIVE

CAA-AD-T-037/2001R1

Supersedes CAA-AD-T-037/2001

Date of issue: May 28, 2002

AIRCRAFT - MAXIMUM FLIGHT LEVEL - REDUCTION

Applicability: All models and versions of:

- L 410

- L 420 serial number S/N 922729A on which Mandatory Service Bulletin No.: L-420/009a has not been accomplished,

produced by LET a.s. Kunovice on which the maximum flight level from 14000 ft to 20000 ft was extended.

Reason: Incorrect indication of Maximum Operating Limit Speed Vmo in flight levels from 14000 to 20000 ft.

Effective date: Upon receipt.

Compliance : Before further flight limit the maximum flight level from 20000 ft to 14000 ft. Operators who are affected by this AD, insert this AD into Aircraft Flight Manual into section 2 page 2-4. Values of flight levels and Maximum Operating Limit Speeds mentioned in placard located near air speed indicator (in range from 14000 ft to 20000 ft) seal up by foil with red color notice “DO NOT USE”. Modify by installing a placard in clear view to both pilots stating: “MAXIMUM FLIGHT LEVEL 14000 ft”.

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