Exceeding the flight parameters may severely damage
the main rotor assembly of the damaged helicopter,
requiring component replacement. Report the amount
and duration of any flight parameter exceeded to the
unit responsible for the damaged helicopter.
The height above ground level may be difficult to
determine during low-level UMARK operations due to
the length of the sling system. Flight crews should
exercise extreme caution during recovery operations
to ensure the damaged helicopter remains clear of
4. COMPONENTS REQUIRED
Components of UMARK utilized during the one-hook, long-line recovery are listed in Table 2. Common equipment
used by the ground rigging crew, such as shockproof gloves, goggles, radios, etc., are not included in UMARK.
No additional tools are required for UMARK assembly or rigging of the helicopters.
Table 2. UMARK Components Required
Black/White 30 Ft Heavy Weight Sling
UH-1 Square Wedge Assembly
Black/White 30 Ft Heavy Weight Sling with Bridle
Fixed Length Tie-Down (With Snap)
Green/White 150 Inches (12.5 Ft) Light Weight Sling
Fixed Length Tie-Down (Without Snap)
Blue/White 360 Inches (30.0 Ft) Light Weight Sling
Blade Sleeve Assemblies
Sling Link Assembly
Blade Pole Assembly
Box Link Assembly
Cargo Hook Thimble
5. DAMAGED HELICOPTER RIGGING
6. Install Tail-Boom Rigging (Figure 1 and Table 3)
Figure 1 details the damaged and recovery helicopter
rigging. Reference numbers in the following text that are
outlined in parentheses [i.e., (1), (2), etc.] refer to Figure 1,
View A and Table 3 item numbers. Refer to Figure 1, View
A and Table 3 for configuration guidance.
a. Connect the green/white sling (1), Figure 1, View A, around the damaged helicopter tail-boom as follows:
(1) Locate the position on the helicopter where the tail-boom joins the main fuselage and loop the
green/white (1) sling around this point.
(2) Connect both eyes of green/white (1) sling to one end of box link (2). (View B)
(3) Secure sling (1) to box link using box link pin and quick-disconnect pin.