TM 1-1520-238-MTF
Change 3
2-74
PROCEDURE
TROUBLESHOOTING
REFERENCE
FLIGHT CHECKS (CONT)
*2. Cruise checks:
a. Perform straight and level flight
(110 KIAS) and note any unusual
vibrations, noises or instrument
indications, and sensor operation.
*b. Instrument correlation – Compare
between crew stations.
**c. Fuel consumption – Complete as
required.
*3. Autorotation – Perform as required.
NOTE
The autorotation check following main ro-
tor maintenance, should be conducted
over a hard surface area preferably with
crash/rescue personnel available.
The autorotation check should be con-
ducted at an altitude that will allow a pow-
er recovery to be completed before
reaching 500 feet AGL.
a. Determine required Nr from
autorotation RPM chart in Chapter
5.
b. Select a suitable autorotational
landing area.
*c. At test altitude record the following:
(1) Pressure altitude.
(2) FAT.
(3) Target Nr as determined from
figure 5-5.
d. Climb approximately 1000 feet
above test altitude.
A5
