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B747 suffers multiple radio anomalies during ILS apches to a foreign airport. After multiple unsuccessful apches divert to another airport under emergency conditions and land. Discover radios loose in racks and electrical connections in need of cleaning.
| Attributes | |
| ACN | 798543 |
| Time | |
| Date | 200808 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzzz.airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach landing : missed approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 7500 flight time type : 1400 |
| ASRS Report | 798543 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : diverted to another airport flight crew : landed in emergency condition |
| Consequence | other |
| Supplementary | |
| Problem Areas | Weather Aircraft |
| Primary Problem | Aircraft |
Narrative:
Flying to ZZZZ1; had to divert to ZZZZ. Shot 3 approachs to ILS DME Y runway xxr. First went missed due to no course alive or navigation capture. Second approach false course alive occurred but no navigation capture. First officer was flying pilot and saw a runway. It was runway 15R. As soon as we saw that it was not runway xxl; we reported it to the controller and went missed. Emergencys declared for fuel and radio problems. Third approach was vector to finals; never saw runway; went missed. Diverted to ZZZZ2 and landed there. After landing; APU fire warning occurred. Used emergency procedures and parked aircraft. Later learned from maintenance that radios were loose in racks and connections needed cleaning. After maintenance; radios worked fine.
Original NASA ASRS Text
Title: B747 SUFFERS MULTIPLE RADIO ANOMALIES DURING ILS APCHES TO A FOREIGN ARPT. AFTER MULTIPLE UNSUCCESSFUL APCHES DIVERT TO ANOTHER ARPT UNDER EMERGENCY CONDITIONS AND LAND. DISCOVER RADIOS LOOSE IN RACKS AND ELECTRICAL CONNECTIONS IN NEED OF CLEANING.
Narrative: FLYING TO ZZZZ1; HAD TO DIVERT TO ZZZZ. SHOT 3 APCHS TO ILS DME Y RWY XXR. FIRST WENT MISSED DUE TO NO COURSE ALIVE OR NAV CAPTURE. SECOND APCH FALSE COURSE ALIVE OCCURRED BUT NO NAV CAPTURE. FO WAS FLYING PLT AND SAW A RWY. IT WAS RWY 15R. AS SOON AS WE SAW THAT IT WAS NOT RWY XXL; WE RPTED IT TO THE CTLR AND WENT MISSED. EMERS DECLARED FOR FUEL AND RADIO PROBS. THIRD APCH WAS VECTOR TO FINALS; NEVER SAW RWY; WENT MISSED. DIVERTED TO ZZZZ2 AND LANDED THERE. AFTER LNDG; APU FIRE WARNING OCCURRED. USED EMER PROCS AND PARKED ACFT. LATER LEARNED FROM MAINT THAT RADIOS WERE LOOSE IN RACKS AND CONNECTIONS NEEDED CLEANING. AFTER MAINT; RADIOS WORKED FINE.
Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.