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Safety Recommendation Details

Safety Recommendation A-00-009
Details
Synopsis: On 8/6/97, about 0142:26 Guam local time, Korean Air flight 801, a Boeing 747-3b5b (747-300), Korean registration HL7468, operated by Korean Air Company, Ltd., crashed at Nimitz Hill, Guam. Flight 801 departed from Kimpo International Airport, Seoul, Korea, with 2 pilots, 1 flight engineer, 14 flight attendants, and 237 passengers on board. The airplane had been cleared to land on runway 6l at A.B. Won Guam International Airport, Agana, Guam, and crashed into high terrain about 3 miles southwest of the airport. Of the 254 persons on board, 228 were killed, and 23 passengers and 3 flight attendants survived the accident with serious injuries. The airplane was destroyed by impact forces and a postcrash fire. Flight 801 was operating in U.S. airspace as a regularly scheduled international passenger service flight under the convention on international civil aviation and the provisions of 14 code of federal regulations (CFR) part 129 and was on an instrument flight rules flight plan.
Recommendation: TO THE FEDERAL AVIATION ADMINISTRATION: Disseminate information to pilots, through the aeronautical information manual, about the possibility of momentary erroneous indications on cockpit displays when the primary signal generator for a ground-based navigational transmitter (for example, a glideslope, VOR, or non-directional beacon transmitter) is inoperative. Further, this information should reiterate to pilots that they should disregard any navigation indication, regardless of its apparent validity, if the particular transmitter was identified as unusable or inoperative.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: NIMITZ HILL, GU, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA97MA058
Accident Reports: Controlled Flight Into Terrain, Korean Air Flight 801, Boeing 747-300, HL7468
Report #: AAR-00-01
Accident Date: 8/6/1997
Issue Date: 1/27/2000
Date Closed: 1/23/2002
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s): System: Navigation, Training and Education

Safety Recommendation History
From: NTSB
To: FAA
Date: 1/23/2002
Response: With the issuance of this revision to the AIM, the FAA has completed the action recommended. Consequently, Safety Recommendation A-00-9 is classified "Closed--Acceptable Action."

From: FAA
To: NTSB
Date: 8/21/2001
Response: Letter Mail Controlled 08/29/2001 4:02:04 PM MC# 2010694: The FAA agrees with the intent of this safety recommendation and has revised paragraph 1-1-1 of the Aeronautical Information Manual (AIM) to include information regarding the possibility of momentary erroneous indications on cockpit displays when the primary signal generator for a ground-based navigational transmitter is inoperative. The revision to the AIM reiterates that pilots should disregard any navigation indication, regardless of its apparent validity, if the particular transmitter was identified as unusable or inoperative. I have enclosed a copy of the revision to the AIM for the Board's information. I consider the FAA's action to be completed on this safety recommendation.

From: NTSB
To: FAA
Date: 6/27/2000
Response: PENDING ISSUANCE OF THE REVISED AIM, A-00-9 IS CLASSIFIED "OPEN--ACCEPTABLE RESPONSE."

From: FAA
To: NTSB
Date: 4/4/2000
Response: Letter Mail Controlled 04/07/2000 2:43:03 PM MC# 2000502 THE FAA AGREES WITH THE INTENT OF THIS RECOMMENDATION AND WILL INCLUDE A NOTE IN THE NEXT REVISION TO THE AERONAUTICAL INFORMATION MANUAL (AIM) ABOUT THE POSSIBILITY OF MOMENTARY ERRONEOUS INDICATIONS ON COCKPIT DISPLAYS WHEN THE PRIMARY SIGNAL GENERATOR FOR A GROUND-BASED NAVIGATIONAL TRANSMITTER IS INOPERATIVE. THE NOTE WILL ALSO REITERATE THAT PILOTS SHOULD DISREGARD ANY NAVIGATION INDICATION, REGARDLESS OF ITS APPARENT VALIDITY, IF THE PARTICULAR TRANSMITTER WAS IDENTIFIED AS UNUSABLE OR INOPERATIVE. IT IS ANTICIPATED THAT THE INFORMATION WILL BE INCLUDED IN THE 1/25/01, REVISION TO THE AIM. I WILL PROVIDE THE BOARD WITH A COPY OF THE REVISION TO THE AIM AS SOON AS IT IS ISSUED.