Sikorsky YCH-53K King Stallion [5架]
MSN EDM-1 thru EDM-4 engineering develoment frames
168778 line number EDM-1. ?First flight Oct 27, 2015. ?Assigned to HX-21 and Boeing for prototype ?testing.
168779 line number EDM-2. ?First flight Jan 22, 2016. ?HX-21 Active May 2014 Jun 2020
168780 line number EDM-3. ?noted 11JUN20. ?HX-21 Active 24 Feb 2014 May 2021
168781 line number EDM-4. ?HX-21 Active Jun 2016 Apr 2020
168782 line number EDM-5. ?HX-21 Active Jul 2017 Oct 2018

Sikorsky YCH-53K King Stallion [4架]
169019 HX-21/VMX-1 Active Apr 2018 Apr 2018
169020 HX-21/VMX-1 Active Apr 2018 Apr 2018
169021 VMX-1 Active May 2018 Mar 2021
169022 HX-21/VMX-1 Active Jun 2021

Sikorsky CH-53K King Stallion [2架]
LRIP Lot 1 (A/C 7) 169662. Is the first of 14 LRIP production aircraft on contract, with a
contracted delivery date of 9/30/2021. Active in January 2022 coded CJ-009 with HMH-461
at MCAS New River, North Carolina
LRIP Lot 1 (A/C 8) 169663. ?Active in March 2022 coded CJ-010 with HMH-461 at MCAS New River, North Carolina.

Sikorsky CH-53K King Stallion [5架]
LRIP Lot 2 (A/C 9) 170001
LRIP Lot 2 (A/C 10) 170002
LRIP Lot 2 (A/C 11) 170003
LRIP Lot 2 (A/C 12) 170004
LRIP Lot 2 (A/C 13) 170005

Sikorsky CH-53K King Stallion [7架]
LRIP Lot 3 (A/C 14) 170006
LRIP Lot 3 (A/C 15) 170007
LRIP Lot 3 (A/C 16) 170008
LRIP Lot 3 (A/C 17) 170009
LRIP Lot 3 (A/C 18) 170010
LRIP Lot 3 (A/C 19) 170011
LRIP Lot 3 (A/C 20) 170012