TM 1-1520-240-MTF2-2PRIOR TO MAINTENANCE TEST FLIGHT (CONT.) Before Interior Check (Cont.) (2) Check the top and bottom latchesengage the door supports and lockingdevises removed.(3) Check through doorplate inspectionholes (upper and lower) that the doorlatches are centered in the latch platedetents.c. Fire Extinguisher — Check seal, security,date, and properly tagged.d. Seat belts and shoulder harness — Checkcondition.7. Fuel sample — Check before first flight of theday.8. AVA equipment installed if tracking is required.9. Accelerometers installed if rotor blade vibrationcheck is required.10. Tiedowns, locking devises, covers, and groundcables — Removed and secured.11. BATT switch — ON. Check MASTERCAUTION/ADVISORY LIGHTS for properindication (no chip detectors). CAUTIONLIGHTS — TEST for illumination of allcaution/advisory light segments.12. APU start (Fire guard posted):a. APU start accumulators — Checkprecharged according to chart in Section V.b. APU — Check condition and servicing.c. EMERGENCY APU FLUID SHUTOFFVALVE — Check OPEN.d. Electronic Sensing Unit — Condition andsecurity.
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