TM 1-1520-240-MTF
4-21
I.
714A P3 BELLOWS CHECK
NOTE
Perform this check anytime maintenance is per-
formed on the engine P3 air line system, Bleed
Band actuator, or P3 drain valve, if the engine ha
had a major repair or been replaced, the HMA or
DECU has been removed and reinstalled or re-
placed, the engines have been washed, or the air-
craft has undergone a phase inspection. During
the P3 Bellows Check, the engine N1 may de-
crease or increase when REV is selected. The en-
gine should not increase or decrease erratically
and should stabilize with no erratic fluctuation
noted.
3. First engine.
a. Engine # 1 FADEC PRI-REV switch (started
engine) — REV.
b. FADEC Caution — ON.
c. N1 — Check stabilized at 50 to 60% or
above.
d. Engine #1 FADEC PRI-REV switch — PRI.
e. FADEC FAIL caution — OUT.
f. Repeat for Engine #2.
J. 714A NO. 1 AND NO. 2 ENGINE REVERSIONARY
START.
Reference:
TM 55-1520-240-23
NOTE
Either engine may be started first.
