STC SA3567WE

This Certificate issued to Northrop Grumman Systems Corporation 21240 Burbank Blvd.

Woodland Hills, California 91367-6675 Part 4b of the Civil Air Regulations (S T C tifi t D t Sh t N A5EU) Original Product Type Certificate Number :

A5EU British Aircraft Corp.

BAC 1-11 Model/Type 401AK, 410/AQ, 419/EP, 412A/EB

Description of Type Design Change: Installation of single or dual Litton LTN-51 or LTN-72 INS in accordance with FAA sealed Litton Top Drawing 454054-05, Revision “A”, or later FAA sealed revision.

Litton Airplane Flight Manual Supplement 2 for BAC 1-11 Model/Type 401 AK, 410/AQ, 419/EP and 412 A/EB, FAA approved on March 14, 1978, or later FAA approved revision is required as part of this modification.

Limitations and Conditions: This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application : January 16, 1978

Date of issuance : March 17, 1978

Date reissued : April 12, 2016

(Signature) Supervisor, Technical & Administrative Support Staff (Title)

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Number (STC No.)