Tail Rotor Hub
Bumper stop condition
Repair or replace as
necessary per TM 1-
Tail Rotor Blade
Repair or replace per
* Wipe blade with cheesecloth, NSN 8305-00-205-3558. Cloth snagging indicates possible crack.
3.1.4 Recovery of Damaged AH-64 Helicopters may further compromise the structural
integrity of the victim helicopter. The damaged helicopter may not be approved for
return to flight status without additional engineering evaluation and possible depot level
inspections. Post recovery personnel should visually identify the areas of damage,
record recovery flight data, and contact AMSAM-RD-AE-I-P-A (Mr. Lee Bumbicka)
for corrective action to return the recovered helicopter to flight status or for deposition
of the recovered damaged helicopter.
References: A. Unit Maintenance Aerial Recovery Kit (UMARK) Analysis Report,
STN 01-015 Revision A, dated 15 May 2001.
3.2.1 The OH-58 SERIES supplemental data compliments Chapter 4 of the UMARK
TM and provides the following recommendations prior to aircraft recovery operations
utilizing the UMARK. The intent is to ensure that all limitations described in reference A
analysis are incorporated for recovery operations.
3.2.2 Additional emphasis is required in Work Packages to preclude victim aircraft
possible damage, especially fragile is the OH-58 tailboom. The following
emphasis/wording is added to preclude damage to the OH-58:
188.8.131.52 Figure 4, Recovery Helicopter Flight Parameters (limitations), incorporates the
required flight parameters for a recovered helicopter in a "Blades On/Off Condition"
and identifies each condition. Highly recommended is the use of a 2g accelerometer to
ensure a 2g event did not occur during transport possibly damaging the tailboom; non-
use will nullify Bell Helicopter's analysis and require extensive inspections for bringing
rotorcraft back to flight status.
184.108.40.206 The use of the Droque Parachute is "Not recommended" by reference A, Use
of Drogue Chute may cause damages to the tailboom and require extensive post aircraft
220.127.116.11 Warning, The recovery helicopter should take care to ensure that the disabled
OH-58 helicopter is lifted first from the Main Rotor Hub before lifting the tailboom to