DOCUMENT TYPE AND REF No TECHNICAL NEWS SHEET CT (MOTH) No 34 Issue 1
 

TITLE: INTRODUCTION OF LOCKING DEVICE FOR FUEL ON/OFF COCK OPERATING LEVER

CLASSIFICATION MANDATORY

PLANNING INFORMATION
Effectivity

DH 82, DH 82A Tiger Moth and Queen Bee.

Reason

During the investigation of a recent aircraft accident it was recommended by the investigating authority that provision should be made for the positive locking of the fuel ON/OFF cock operating fever in the ON position. Under certain circumstances it is possible during flight for the operating lever to move away from the ON position and thus restrict fuel flow to the engine.

Description

This Technical New Sheet (TNS) CT (MOTH) No 34 Issue 1 requires all operators of DH 82, DH 82A Tiger Moth and Queen Fee aircraft to embody Moth Modification 155 to provide positive locking of the fuel ON/OFF cock operating lever in the ON position. The Modification is to be embodied not later than the next Annual Check or within 25 flying hours from the date of issue of this TNS, whichever comes sooner.

Compliance

The work detailed within the Accomplishment Instructions of this Technical News Sheet (TNS) CT (MOTH) No 34 Issue 1 has been classified MANDATORY by the United Kingdom Civil Aviation Authority (CAA).

Moth Modification 155, or an equivalent method approved by the operator's local Airworthiness Authority, is to be embodied at the next Annual Check or within 25 flying hours from the date of issue of this TNS, whichever comes sooner. DATED Ist March 1999

Approval

The contents of this Technical News Sheet (TNS) CT (MOTH) No 34 Issue 1 have been approved under the authority of the United Kingdom Civil Aviation Authority approval ref: DAI/9402/92.

References

Appendix A attached.

Modification(Moth) No 155.

Publications Affected
de Havilland Tiger Moth Pilot's Notes.

de Havilland Tiger Moth Maintenance and Repair Manual.

British Aerospace TNS Series CT (Moth).

Material Information
See Leaflet Moth Modification 155 attached as Appendix A to this TNS CT
ACCOMPLISHMENT INSTRUCTIONS
Work Required
Install a mechanism to provide positive locking of the fuel control rod in accordance with the embodiment details contained in Moth Modification 155, or an alternative method approved by operator's local Airworthiness Authority. The Modification leaflet is attached as Appendix A to this TNS CT (Moth) No 34 Issue 1.
Work Required - Manuals
Tiger Moth Pilot's Notes (DHTM 1, Section 1, Chapter III) The following text is to be inserted in the de Havilland Tiger Moth Pilots Notes, paragraph 2:
DH 82A and Queen Bee: When Moth Modification 155 has been embodied, the fuel control rod cannot be selected to the OFF position until the spring-loaded locking device, adjacent to the control rod in the rear cockpit, is depressed.

DH 82: When Moth Modification 155 has been embodied, the fuel control rod cannot be selected to the OFF position until the locking device, adjacent to the control rod in the rear cockpit, is released.

Tiger Moth Maintenance and Repair Manual, Section 1, Chapter VIII (Fuel System) paragraph 3.
DH 82A and Queen Bee Moth Modification 155 introduces to the rear cockpit a device to provide positive locking of the fuel control rod in the ON position. When the Modification has been embodied, the fuel control rod cannot be selected to the OFF position until the spring-loaded locking device, adjacent to the control rod in the rear cockpit, is depressed.

DH 82 Moth Modification 155 introduces to the rear cockpit a device to provide positive locking of the fuel control rod in the ON position. When the Modification has been embodied, the fuel control rod cannot be selected to the OFF position until the locking device, adjacent to the control rod in the rear cockpit, is released.

RECORDING
Record compliance with this TNS No 34 Issue I and Moth Modification No 155 in the appropriate aircraft technical records.

Whenever a Technical New Sheet is issued or an earlier TNS is re-issued, operators are required to hand amend the copy they hold of TNS CT (Moth) No 1, "LISTING OF TECHNICAL NEWS SHEETS" to ensure an up-to-date index is maintained.

REPORTING
When reporting details of faults found, or in cases where technical advice is required contact

 

The Engineering Support Manager

British Aerospace Aerostructures Ltd

Military Business Unit

Chadderton Works

Greengate

Middleton

Manchester

M24 1 SA	Telephone:	+44 (0)161 955 8789
ENGLAND	Fax:	+44 (0)161 955 8798

DATED 1st MARCH 1999