BHT-206A/B-SERIES-MM-1 TC APPROVED
4-00-00
Page 14 Rev. 16 25 JUN 2019 Export Classification C, ECCN EAR99
Usable only on model 206A, S/N 5001 through 5040. These part numbers are reserved for US Army,
model TH-57 training helicopters.
Cylinder per DOT-3HT and DOT-E7218 specifications. Refer to IL GEN-93-52, dated 21 June 1993.
Cylinder per FAA specifications. Refer to IL GEN-93-52, dated 21 June 1993.
Upper collective tube 206-001-024-029 is not listed and is conditional.
Main rotor latch bolts 206-010-169-001/-003 and 206-011-122-003 must be removed from service.
Refer to ASB 206-06-109, dated 25 July 2006, and Transport Canada AD CF-2006-23, dated
6 November 2006.
Part of squib assembly 29022971 and approved alternate for squib 30908. Retire squib no later than
15 years after date of manufacture. Dispose of time expired squib in accordance with local regulations.
Storage life of cutter assembly Y-1265-11-1, in original sealed container, is set at 60 months. Service life
is 36 months from the time the cutter assembly is removed from the original sealed container. The
36-month service life must be contained within the 60-month storage life. Dispose of time expired squib
in accordance with local regulations.
Example 1 – Cutter assembly stored for 24 months: 60 - 24 = 36-month service life.
Example 2 – Cutter assembly stored for 48 months: 60 - 48 = 12-month service life.
Example 3 – Cutter assembly stored for 1 month: 60 - 1 = 59 months, reduced to 36 months maximum
service life.
Main rotor hub tension torsion straps 206-310-004 have an airworthiness life of 1200 hours or 48
months, whichever occurs first. The calendar life of 48 months starts when new straps are installed in a
main rotor hub and blade assembly, and are subjected to rotation on the helicopter.
Table 4-1. Airworthiness Limitations Schedule (Cont)
NOTES (CONT):
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