TM 1-1520-240-MTF2-41STARTING ENGINES (CONT.) B*23. Parking Brakes/Swivel Locks.a. Wheel parking brakes — Reset. CheckPARK BRAKE ON, 712 caution light andMaster Caution, 714A Advisory light —On.F b. SWIVEL switch — Check UNLOCK andLOCK, (check status of swivels down andlocked or down but not locked).WARNINGAnytime the ramp isolation switch is movedfrom one position to another ensure NCM’shand is clear of the ramp control handle.24. Ramp Isolation — Check as follows: (Notrequired if completed during power on checks.Check emergency control as required, seesection IV).a. Place ramp control lever in the DOWNposition until ramp rests on the ground, thenSTOP.b. RAMP isolation switch — OFF.c. RAMP control lever — UP. Check that rampdoes not move, then STOP.d. RAMP isolation switch — ON.e. Adjust ramp as necessary.B25. Cruise Guide Indicator — Test FWD and AFT.Check pointer in white test band within 8seconds.B*26. Altimeters — Set local barometric pressure(tower setting) and compare with field elevation.If more than a 50 foot error is noted, correctiveaction should be initiated. Unreliable for flight ifmore than a 70 foot error exists.
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