NSN: 5998-01-253-7978 JY CIRCUIT CARD ASSEMB

This engineering order (EO 2012C1107‑T) authorizes a change to the F‑16 aircraft printed wiring assembly (part number 2121561‑2). The change requires the addition of a Unique Item Identifier (UII) label in accordance with MIL‑STD‑130, and provides part numbers for the label and an alternate. The EO also updates the parts list, removing obsolete references and specifying the use of PV6 Tesa® Secure™ tape or equivalent for label attachment. The work is limited to marking and minor parts‑list adjustments for an existing Air Force component. • Part: NSN 5998‑01‑253‑7978 JY Circuit Card Assembly (PN 2121561‑2) • Applies to F‑16 aircraft power‑supply printed wiring assembly • Requires fabrication and installation of a UII label (PN 200733803‑31, alternate 200945085‑011A) • Uses PV6 Tesa® Secure™ tape for attachment • Engineering order dated 8 Mar 2012, signed by Lt. Nathan Nash and Maj. (or equivalent) Mark E. McGowan • No external solicitation; internal DoD engineering change.