TM 55-1520-228-BD
CHAPTER 5
ALIGHTING GEAR
BDAR FIXES SHALL BE USED ONLY IN COMBAT OR FOR TRAINING
AT THE DISCRETION OF THE COMMANDER.
(AUTHORIZED TRAINING FIXES ARE LISTED IN APPENDIX E.)
IN EITHER CASE, DAMAGES SHALL BE REPAIRED BY STANDARD
PROCEDURES AS SOON AS PRACTICABLE.
Section I. INTRODUCTION
5-1. SCOPE. This chapter contains
information for deferring repair and
expedient field fixes of battle damaged
alighting gear assembly. The repairs or
field fixes can only be applied to the
skid tubes.
5-2. DESCRIPTION.
The alighting gear
assembly, Figure 5-1, consists of two
tubes (1) and two arched crosstubes (2)
and (3) fastened together with skid
saddles (4), and attaching hardware.
The assembly is attached to the lower
structure with support assemblies
(5 and 6) at four points.
Replaceable steel skid shoes (7) are
attached to the bottom of the skid
tubes to prevent damage from contact
with the ground.
5-3. ASSESSMENT PROCEDURES. Refer to
Table 5-1.
5-4. REPAIR PROCEDURE INDEX.
PARA.
Hard Landings, Sudden Stops . 5-6
Skid Damage . . . . . . . . . 5-7
Section II. SKID TUBE
5-5
●
GENERAL INFORMATION.
a. In battle conditions, part of the
skid tube may sustain various amounts of
damage which may be deferred.
NOTE
The conditions in this paragraph
apply only to damage to the skid
tube (1, Figure 5-l).
b.
Deferrable skid tube damage:
(1) Damage to Sections A and E,
Figure 5-2, may include up to complete
rupture.
(2) Damage to the junction of the
crosstubes and skid tube, Sections B and
D, Figure 5-2, may include up to one-
half of the cross section of the skid
tube as long as alighting gear is not
too badly deformed.
(3) Damage to Section C, Figure
5-2, may be deferred unless skid tube is
so deformed that alighting gear is not
functional.
5-6. HARD LANDINGS, SUDDEN STOPS.
GENERAL INFORMATION.
a. Any hard landings which per-
manently deform the crosstubes, so that
the spread of the skid tubes is in
excess of 74 inches, may cause damage to
the structure, transmission, or rotor.
b.
Binding or unusual noises in the
transmission may require replacement of
rotor and the transmission. This is not
BDAR.
NOTE
Aircraft grounded until assessed
flight worthy.
5-1
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