Aircraft Inspection Mandatory

Number:
053/06/2012
Date:

Issue:
1

Subject:

Electric Self Sustainer Maintenance

Applicability:

Self Sustainer Sailplanes fitted with Electric engine propulsion

Accomplishment: At annual inspection

Reason:

Defining maintenance requirements for continued airworthiness Note: these requirements form part of the BGA GMS Maintenance Programme and will be incorporated at the next revision.

Instructions:

These maintenance instructions are additional to and must be read in conjunction with Type Certificate Holders maintenance recommendations. Refer to engine/propeller/airframe manufacturer for limits, maintenance, repair and overhaul information. Note: Maintenance certification can only be made by a BGA inspector with Electric Powerplant (EP) Authorisation.

Prior to commencing maintenance, interrogate on board log and fault recording (if fitted) to establish pre existing faults. Refer to manufacturer for rectification instructions.

CAUTION: Prior to commencement of work ensure the powerplant is safe, electrical supply isolated and observe caution regarding strong magnetic fields as recommended by type certificate holder.

CAUTION: Propeller bladed will extend under gravity in certain fuselage attitudes. If holding tape is used ensure it is of contrasting colour and removed before testing and before flight.

Task 1 – Propeller Clean propeller, carry out pre-flight inspection. Check propeller bladed for damage, cracks and delamination. Check surface protection lacquer for condition.
Issued by - The British Gliding Association Ltd, 8 Merus Court, Meridian Business Park, Leicester. LE19 1RJ. Note: Mandatory inspections must be recorded in the aircraft log book, unless specified, and certified by an appropriately rated BGA inspector.
Optional inspections should be entered into the D.I. book or log book as appropriate. Optional inspections may be certified by a BGA Pilot. Alternative methods of compliance will be considered providing an equal level of safety is accomplished. Contact BGA for authorisation.

Check torque the propeller mounting bolts. Check track of propeller blade tips. Observe Propeller TBO. Lubricate propeller blade attachments.
Task 2 – Motor Inspect the motor assembly for signs of damage, overheating or deterioration. Check all mounting and electrical connections, cables, grommets for security, overheating and damage. Check for foreign objects and debris in the motor. Observe motor TBO and replacement of motor bearings.
Task 3 – Controller and main contactor Check for security, signs of overheating and damage. Check all electrical connections. Check main inverter. Check motor controller display and function. Check operation of canopy open inhibit switch.
Task 4 – Propeller brake Check operation of propeller brake
Task 5 – Motor mounting frame Check motor mounting frame for security, damage and deterioration.
Task 6 – Gap between spinner and fuselage Check gap between spinner and fuselage in accordance with LAK-17A EFS Maintenance manual.
Task 7 – Motor accessories and cooling Check all motor accessories for security, damage and deterioration. Check pot ventilator for operation and signs of damage. Clean if necessary.
Task 8 – Bolted connections Check all bolted connections observing any specific torque loadings and adjustments
Task 9 – Motor mounting Check motor mounting for security, damage and deterioration.
Issued by - The British Gliding Association Ltd, 8 Merus Court, Meridian Business Park, Leicester. LE19 1RJ. Note: Mandatory inspections must be recorded in the aircraft log book, unless specified, and certified by an appropriately rated BGA inspector.
Optional inspections should be entered into the D.I. book or log book as appropriate. Optional inspections may be certified by a BGA Pilot. Alternative methods of compliance will be considered providing an equal level of safety is accomplished. Contact BGA for authorisation.

Records

Task 10 – Power cables Check all control and power cables for signs of overheating, chafing, security, damage and deterioration. Pay special attention to cables running through rudder pedal support.
Task 11 – Battery Check batteries for damage, leakage, electrolyte level, corrosion on terminals. Check battery bay and cover for signs of acid contamination, security, damage and deterioration of mounting and securing clamps. Check operation of drains. Observe battery recommended life.
Task 12 – Ground run Carry out function test and ground run observing all safety precautions.
Record all work on worksheets and aircraft log book in accordance with M.A.401 (c) Use BGA 285 to record routine maintenance and inspections.

Approved By Jim Hammerton, Chief Technical Officer

Issued by - The British Gliding Association Ltd, 8 Merus Court, Meridian Business Park, Leicester. LE19 1RJ. Note: Mandatory inspections must be recorded in the aircraft log book, unless specified, and certified by an appropriately rated BGA inspector.
Optional inspections should be entered into the D.I. book or log book as appropriate. Optional inspections may be certified by a BGA Pilot. Alternative methods of compliance will be considered providing an equal level of safety is accomplished. Contact BGA for authorisation.