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NEWS | Aug. 11, 2023

Black Hawk: Get Alternative Nut for Pedal Adjuster Assemblies

BLUF:  Use alternative nut SS5092-4 on pedestal adjuster assemblies for UH-60A/L/M until preferred nut MS21244-4 is available.

Chief Warrant Officer 4 Nate Spaulding and Warrant Officer 1 Tyler King, pilots with the Idaho Army National Guard's 183rd Aviation Regiment, practiced their flight maneuvers in the UH-60 Black Hawk helicopter.
Photo by Master Sgt. Becky Vanshur
 
Mechanics, TM 1-1520-237-23&P (Apr 23), TM 1-1520-246-23&P, and TM 1-1520-280-23&P for the UH-60A/L/M helicopters specify the use of the MS21244 nut on the pedal adjuster assembly for each helicopter. There’s one problem: demand for this nut exceeds inventory.

So, in the interim, the Utility Helicopter Project Office (UHPO) has approved the use of SS5092-4 nut as an acceptable alternative until the preferred MS21244-4 nut is available.
 
The alternative nut meets all prerequisites of MIL-DTL-9490, reference 1.b. and is equivalent in dimensions, strength and galvanic compatibility. It’s also already available in the supply system.
 
Use alternative nut SS5092-4 on pedestal assemblies until preferred MS21244-4 nut is available
Use alternative nut SS5092-4 on pedestal assemblies until preferred MS21244-4 nut is available
 
For all the significant details on using the alternative nut, check out Page 7 of the Utility Helicopter Newsletter HERE.
Black Hawk
UH-60
UH-60 Black Hawk
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