STC SA3928SW-D

United jStsxa of 2Unia Bepartment of transportation—/etoal Stoiation Administration supplemental t;gpe Certificate SA3928SW-D American Airlines, Inc.

P. O. Box 582809 Engineering Dept, MD 208 Tulsa, Oklahoma 74158-2809 25 #,/ Federal Aviation -mi/.

A6WE McDonnell Douglas DC-9-82/-83 Installation of a single Litton LTN-311 Omega/VLF Navigation System (ONS), including software program 311-04-03A, in aircraft equipped with analog flight instruments (Non-EFIS aircraft). The ONS is installed in accordance with American Airlines Engineering Change Order (ECO) K1782XX dated 02-23-93, or later DAS1SW approved revisions.

This approval should not be incorporated in any aircraft of this specific model until compatibility of this modification with other previously approved modifications has been determined.

This modification is applicable only to aircraft with ONS provisions installed in accordance with American Airlines ECO K1139EX dated March 26, 1987, or later DAS1SW approved revisions. The ONS provisions were certified by Amendment 3 of this STC.

Modification of aircraft per this STC requires American Airlines DC-9 Airplane Flight Manual MDC-J8480 Supplement No. 1 dated July 29, 1988.

^tr^-&svityi^a/&sa*idJ^J^/^4^vn^Jcfa/M 27> 1986 May 23, 1986 ,, , , ,. 7/31/87, 1 1/6/87, 7/29/88,7/6/89,f S-* ——— U. , 2/16^3, 4/19/93 Amend 7 /J-u>Jatfff/tt-rt M £nt' R. J.Walker (Signature) DAS 1SW Coordinator (Titlt)

FAAFo«« 81 10-2 (10-68)

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