The bulletin
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FAA Aircraft Certification Service
SPECIAL AIRWORTHINESS
INFORMATION BULLETIN SUBJ: Navigation – KTR 2280 Multi-Mode Digital Radio (MMDR) SAIB: CE-08-35 Date: July 16, 2008 This is information only. Recommendations aren’t mandatory.
Introduction
This Special Airworthiness Information Bulletin (SAIB) advises you, aircraft owners, operators, maintenance organizations, and parts distributors, to inspect the Honeywell KTR 2280 MMDR for the potential of improper 8.33 kHz operation and upgrade them to bring back to conformance with type design.
Background
This SAIB is prompted by Honeywell International Inc.’s self-disclosure to the Wichita Aircraft Certification Office that their KTR 2280 MMDR, part number (P/N) 069-01037-0101, is in noncompliance with TSO-C37d Class 5 and TSO-C38d Class E. The KTR 2280 MMDR can experience improper operation if the power is interrupted while it is channeled to some 8.33 kHz channels.
The KTR 2280 MMDR remains functional for 25 kHz channel operation. At this time, the airworthiness concern is not an unsafe condition that would warrant airworthiness directive (AD) action under Title 14 of the Code of Federal Aviation Regulations (14 CFR) part 39.
Honeywell International Inc. has issued two service bulletins (SB):
• SB KTR 2280-34-02, which limits KTR 2280 MMDR, P/N 069-01037-0101, to 25 kHz channel operation only; and
• SB KTR 2280-34-03, which can be used to upgrade P/N 069-01037-0101 to P/N 069-01037- 0102.
Recommendations
Honeywell International Inc. has corrected the 8.33 kHz channel operation and received TSO-C37d Class 5 and TSO-C38d Class E approval for their KTR 2280 MMDR, P/N 069-01037-0102. We recommend that you inspect your aircraft, aircraft records, and or parts inventories for Honeywell KTR 2280 MMDR (P/N 069-01037-0101) and contact Honeywell International Inc. at the address below for unit upgrade per Service Bulletin SB KTR 2280-34-03.
The units that may exhibit improper 8.33 kHz operation are P/N 069-01037-0101, all serial numbers.
For Further Information Contact
Albert Ma, Aerospace Engineer, FAA Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Wichita, KS 47209; phone (316) 946-4151; facsimile:(316) 946- 4107;email:albert.ma@faa.gov
2 For Related Service Information Contact
Honeywell International Inc., 23500 W 105th Street, Olathe, KS 66061 U.S.A; Phone: (800) 601- 3099 (U.S.A) or (602) 365-3099 (International)