TM 1-1520-238-23
1-420
Change 5
SECTION IX. FLIGHT SAFETY PARTS PROGRAM
1.140.
FLIGHT SAFETY PARTS PROGRAM
a. A flight safety part (FSP) is defined as any part, assembly, or installation whose failure, malfunction, or absence
could cause loss of aircraft, serious damage to aircraft, death of crewmembers, or serious injury to crewmembers.
b. A Critical characteristic is defined as any feature throughout the life cycle of a FSP, such as a dimension,
tolerance, finish, material or assembly, manufacturing process, inspection process, operation, field maintenance
requirement, depot overhaul requirement, or other feature that if nonconforming, missing, or degraded, could cause
failure or malfunction of a FSP.
c. The following list identifies parts and assemblies under the flight safety parts program. Throughout the
maintenance tasks, FLIGHT SAFETY PARTS warnings appear emphasizing that these parts require special han-
dling during maintenance.
d. The list has two headings:
Part Number
– Number assigned to the part. Refer to TM 1-1520-238-23P for
part numbers of replacement parts.
Nomenclature
– Name of the part.
Part Number
Nomenclature
Airframe Components
7-211160040-7
Support Assembly, Rotor
7-311160020-5
Mast, Main Rotor Support
7-311160035-7
Mast Base
7-311160044-3
Bolt, Mixer Support
7-311210100-3
Main Landing Gear Subassembly – Kneeling
7-311210100-4
Main Landing Gear Subassembly – Kneeling
7-311340185-11
Strut, Tail Rotor
7-311340185-13
Strut, Tail Rotor
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