TB 1-1520-210-20-38
d. Aircraft in Transit.
(1) Surface/Air Shipment. Within 5 hours or 7 days of arrival.
(2) Ferry Status. Inspect at final destination. Those aircraft that have a DD 250 and are
located at U.S. Helicopter will be inspected prior to ferry to final destination.
e. Maintenance Trainers (Category A and B). N/A.
f.
Components/Parts in Stock at Ail Levels (Depot and Others) including War Reserves.
N/A.
g. Components/Parts in Work (Depot Level and Others). N/A.
2. Task/Inspection Suspense Date. Within 5 flight hours/7 days.
3. Reporting Compliance Suspense Date. No later than 16 Jan 98 in accordance with paragraph
14.a. of this TB. If compliance with SOF UH-1-98-01 has been reported, no further compliance reporting
is required.
4. Summary of Problem. Recent analysis of fatigue test data has shown that the 3600-hour retirement
life for the UH-1 Tail Rotor Slider is in error, and the correct life is 3000 hours. Furthermore, certain
sliders with CAGE code 0H0W5 (zero-hotel-zero-whiskey-five) have an undersized outside tube diameter.
The fatigue life on these special case sliders was previously established in Safety of Flight Message UH-1-
96-02 as 170 hours, Subsequent testing has shown that the life of these sliders is 250 hours.
a. Units have requested an alternate method to positively identify the 250-hour sliders manufactured
by Collins, when the identification of CAGE Code 0H0W5 (zero-hotel-zero-whiskey-five) is not possible. In
many cases, the CAGE code was ink stamped and subsequently covered with paint. The 250-hour
Collins sliders may be positively identified by serial number. Verification using the CAGE code is not
required.
c. The Purpose of this TB is to:
(1) Reduce the current 3600-hour retirement life on the UH-1 Tail Rotor Slider to 3000 hours.
(2) Provide two methods (either CAGE code or serial number) to positively identify certain special
case sliders which have and 250-hour retirement life.
5. End Items to be Inspected. All UH-1 series aircraft.
6. Assembly Components to be Inspected. N/A.
7.
Parts to be Inspected.
NOMENCLATURE
PART NO.
NSN
Tail Rotor Slider
204-010-720-3
1615-00-859-6111
8. Inspection Procedures.
a. Using the aircraft records, identify the serial number and time since new (TSN) of the Tail Rotor
Slider installed on the aircraft.
2