(3) Take the end of the safety wire just looped under the middle two wires on the spring lock and loop
twice around the right hand side (Point C) of the spring lock and tighten.
(4) Bring both ends of the safety wire together, trim to approximately 1.5 inches and twist five times into
a pigtail. The excess wire shall be cut off, and the pigtail shall be bent under and into the middle two
wires (Point B) of the spring lock in a manner that will prevent it from becoming snagged.
Improper function of a crossbar assembly spring lock
may allow a rope or tie down to slip off when slack.
d. The spring locks on the cross bar assembly are to be checked for proper operation. The torsion springs must
be seated in the lugs and on the locks.
Improper spring lock function of a tie-down may allow
a rope or tie down to slip off the blade sleeve D-ring
e. The eyehook spring locks on the ropes and adjustable tie downs are to be checked for proper operation.
If the lifting clevis assembly pivot block is not rotating
freely, excess loads on the hub nut of the recovered
helicopter may result.
f. The pivot block of the lifting clevis must move freely on the clevis pins.
3. POST RECOVERY PROCEDURES
Table 1 lists preventive maintenance checks, and service and replacement criteria for the UMARK components.
Post recovery procedures consist of performing all items in Table 1 on those items used.
Ensure each aircraft recovery (actual flight lifting) is
annotated in its usage log. Once a single UMARK kit
reaches 20 actual lifts, call Aviation Ground Support
Equipment office (SFAE-AV-AS-AG) at (256) 876-5145 or
(256) 842-9947, and turn in the UMARK kit for post field
analysis. Analysis is also conducted at 40 and 80 lifts for
first kit usage only. This analysis is only for the first kit
reaching 20, 40, and 80 lifts. Normal analysis is visual as
described in Table 1. Ensure that kits usage log is
annotated with the latest lift usage.
Each UMARK kit contains a usage log (Figure 2 UMARK Usage Tracking Form) that shall be annotated after each
usage. Upon reaching 20 actual lifts call the Aviation Ground Support Equipment office (SFAE-AV-AS-AG) at (256) 876-
5145 or (256) 842-9947, and turn in the UMARK kit for post field analysis.
a. Following post recovery component maintenance all UMARK components shall be repacked into the UMARK
containers in a neat and orderly fashion. The UMARK containers should then be secured and stored for the
next aerial recovery mission.