TM 1-1510-225-10
5-1
CHAPTER 5
OPERATING LIMITS AND RESTRICTIONS
Section I. GENERAL
5-1. PURPOSE.
This chapter identifies or refers to operating
limits and restrictions that shall be observed during
ground and flight operations.
5-2. GENERAL.
The operating limitations set forth in this chapter
are the direct result of design analysis, tests, and
operating experiences. Compliance with these limits
will allow the pilot to safely perform the assigned
missions and to derive maximum utility from the
aircraft. Limits concerning maneuvers, weight, and
center of gravity are also covered in this chapter.
5-3. EXCEEDING OPERATIONAL UNITS.
Anytime an operational limit is exceeded, an
appropriate entry shall be made on DA Form
2408-13-1. Entry shall state the limit or limits that
were exceeded, range, time beyond limits, and any
additional data that would aid maintenance personnel
in the maintenance action that may be required.
5-4. MINIMUM CREW REQUIREMENTS.
The minimum crew required for aircraft flight
operations is two pilots.
Section II. SYSTEM LIMITS
5-5. INSTRUMENT MARKINGS.
Figure 5-1, Sheets 1 through 8, illustrates the
instruments' operating limitations. The operating
limitations are color coded on the instrument faces.
Color coding of each instrument is explained in the
illustration.
5-6. INSTRUMENT MARKING COLOR CODES.
The colored markings that appear on the dial
faces of engine, flight, and utility system instruments
indicate operating limitations and ranges. Red
markings indicate the limit above or below which
continued operation is likely to cause damage or
shorten life. The green markings indicate the safe or
normal range of operation. The yellow markings
indicate the range when special attention should be
given to the operation covered by the instrument.
Operation is permissible in the yellow range, but
should be avoided. White markings on the airspeed
indicator denote the flap operating range. The blue
marking on the airspeed indicator denotes best rate of
climb with one engine inoperative, at 12,500 lbs.,
maximum forward center of gravity, sea level standard
day conditions.
5-7. PROPELLER LIMITATIONS.
R The maximum propeller overspeed limit is
2200 RPM and is time-limited to 5 seconds. Sustained
propeller overspeeds faster than 2000 RPM indicate
failure of the primary governor. Flight may be
continued at propeller overspeeds up to 2120 RPM,
provided torque is limited to 81%. Sustained propeller
overspeeds faster than 2120 RPM indicate failure of
both the primary governor and the overspeed
governor.
T3 F3 The maximum propeller overspeed limit
is 2200 RPM and is time-limited to 5 seconds.
Sustained propeller overspeeds faster than 2000 RPM
indicate failure of the primary governor. Flight may be
continued at propeller overspeeds up to 2120 RPM,
provided torque is limited to 1800 ft -lb. Sustained
propeller overspeeds faster than 2120 RPM indicate
failure of both the primary governor and the overspeed
governor.
