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d. The helicopter shall be limited to a maximum of
2.0g’s when any external tank(s) contain fuel. There
are no limitations on normal load factor, except for figure
5-3, when all external fuel tank(s) are empty.
e. With external fuel tanks (2 or 4) symmetrically
installed, the following restrictions apply:
(1) Normal load factor of 2 g’s shall not be exceeded.
(2) Maneuvers are limited to those required to
takeoff, climb to optimum altitude, heading/course
corrections, obstacle avoidance, descend, and land.
(3) Two hundred thirty (230) gallon external
fuel tanks shall be in the flight stowed position [four
degrees (4°) nose-up with respect to waterline (WL)].
(4) Rapid and step-shaped pedal inputs in excess
of 1/2 inch shall be avoided.
5.18 LANDING LIMITS.
Do not complete a landing on terrain which produces a
pitch attitude change from a hover greater than 7° nose
up or 12° nose down; or a roll attitude greater than 10°.
5-14 Change 4
TM 1-1520-238-10
Figure 5-3. Flight Envelope Chart
5-15
TM 1-1520-238-10
5-16 Change 6
Section VII. ENVIRONMENTAL RESTRICTIONS
5.19 ENVIRONMENTAL RESTRICTIONS.
CAUTION
Intentional flight into known or forecast
moderating icing is prohibited.
a. The AH-64A helicopter is equipped with de-icing
and anti-icing equipment for flights into light icing
conditions.
b. This aircraft is qualified for operation in instrument
meteorological conditions.
c. Deleted.
d. For operation in adverse enviormental conditions,
reference Chapter 8, Section V.
TM 1-1520-238-10
Section Vlll.
5.20 WING STORES CONFIGURATION.
For authorized wing stores configurations refer to figure
7-18 701 or figure 7A-18 701C.
5.21 ALTERATION OF CBHK VALUES.
Only maintenance qualified personnel are authorized
to alter values from current CBHK values, unless performing
the AWS dynamic harmonization procedure.
Aviators may only verify and correct CBHK values, other
than the gun, to the current CBHK values as recorded
in the aircraft logbook. When aviators modify
OTHER LIMITS
gun values while performing dynamic harmonization,
the new values will be entered on DA form 2408-13-1
for maintenance review and transcription.
5.22 TRIM AND FORCE FEEL.
Use of the Trim and Force Feel Release switch in the
FORCE TRIM OFF position with the helicopter on
the ground is not authorized. Inflight operation with
the Trim and Force Feel Release switch in FORCE
TRIM OFF position is authorized when briefed and
the FORCE TRIM OFF selection is acknowledged by
both crewmembers.
5-17/(5-18 blank)
TM 1-1520-238-10
CHAPTER 6
WEIGHT/BALANCE AND LOADING
Section I. GENERAL
6.1 INTRODUCTION.
This chapter provides information required for helicopter
loading and computing weight and balance. This
chapter contains sufficient instructions and data so
that an aviator, knowing the basic weight and moment
of the helicopter, can compute any combination of
weight and balance using the prescribed Army charts
and forms.
centroid is at station 82.2, but the seat can be adjusted
so the CPG centroid can vary from station 81.9 to 82.8.
This produces a small moment variation and should be
ignored.
6.2 HELICOPTER CLASS.
6.3.2 Pilot Crew Station. The pilot station extends
from station 115.0 to station 168.0. The pilot nominal
centroid is at station 143.3, but the seat can be adjusted
so the pilot centroid can vary from station 142.8 to
143.8. This produces a small moment change and
should be ignored.
The Army AH-64A helicopter is in Class 2. Additional
directives governing weight and balance of Class 2 aircraft
forms and records are contained in AR 95-1.
6.3 HELICOPTER COMPARTMENTS AND STATIONS.
The helicopter has many compartments (fig 6-1). Most
of them contain electronic or other equipment. The
boundaries of all compartments and a listing of the
equipment in each compartment are provided in the helicopter
records Chart A - Basic Weight Checklist, DD
Form 365-1. The compartments of primary concern to
the pilot, when loading, are the CPG and pilot crew stations,
left aft storage bay, and survival kit bay. These
compartments may contain personal items or extra
equipment not accounted for in basic weight. (Refer to
paragraph 6.18). Any additional items must be entered
on the Weight and Balance Form F (DD 365-4).
6.3.3 Left Aft Storage Bay. The aft storage bay is on
the left side from fuselage station 280.0 to 310.0 and
can be loaded to 15 pounds per square foot with a capacity
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