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During training flight with inexperienced flight crew, aircraft had numerous NAVAID radio problems. Aircraft was landed at off line airport to check radios. After landing and resetting circuit breakers, all system were back to normal.
| Attributes | |
| ACN | 327646 |
| Time | |
| Date | 199602 |
| Day | Sat |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : bfm |
| State Reference | AL |
| Altitude | msl bound lower : 10000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach landing other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 20 flight time total : 3800 flight time type : 20 |
| ASRS Report | 327646 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 55 flight time total : 10000 flight time type : 4000 |
| ASRS Report | 327193 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
En route on radar vectors to sjj to land at mobile downtown. Leaving 10000 ft MSL, tuned radio to (112.8) bfm and signal appeared unreliable. Continued with radar vectors (ZHU) to south for set up vectors to mob. Current course crossed over bfm. Crossing bfm, tuned in ILS runway 32 bfm (108.5) with no success. Turning north, 108.5 still unusable. Continued to ILS runway 32 mob tuning 111.5 without success once again. Elected to take vectors back to south with ZHU. Upon turning north, attempted tuning of runway 32 ILS bfm (108.5) and runway 32 ILS mob (111.5) without success. Told controller we would attempt VOR runway 18 downtown but VOR signal remained unreliable. On this attempt, we saw mobile regional visually but was too high to make visual approach and landing. Captain elected to vector south and set up for visual approach and landing at mob due to unreliable aircraft navaids. To divert to designated alternate (new orleans) would have required us to enter IMC conditions with unreliable navaids. After shutdown, we recycled all NAVAID circuit breakers. We then ground tested VOR (semmes) and ILS runway 32 mob (111.5) with success. Elected to launch back to bfm once approach control was up and operational and could provide an ASR if ILS/VOR still questionable.
Original NASA ASRS Text
Title: DURING TRAINING FLT WITH INEXPERIENCED FLC, ACFT HAD NUMEROUS NAVAID RADIO PROBS. ACFT WAS LANDED AT OFF LINE ARPT TO CHK RADIOS. AFTER LNDG AND RESETTING CIRCUIT BREAKERS, ALL SYS WERE BACK TO NORMAL.
Narrative: ENRTE ON RADAR VECTORS TO SJJ TO LAND AT MOBILE DOWNTOWN. LEAVING 10000 FT MSL, TUNED RADIO TO (112.8) BFM AND SIGNAL APPEARED UNRELIABLE. CONTINUED WITH RADAR VECTORS (ZHU) TO S FOR SET UP VECTORS TO MOB. CURRENT COURSE CROSSED OVER BFM. XING BFM, TUNED IN ILS RWY 32 BFM (108.5) WITH NO SUCCESS. TURNING N, 108.5 STILL UNUSABLE. CONTINUED TO ILS RWY 32 MOB TUNING 111.5 WITHOUT SUCCESS ONCE AGAIN. ELECTED TO TAKE VECTORS BACK TO S WITH ZHU. UPON TURNING N, ATTEMPTED TUNING OF RWY 32 ILS BFM (108.5) AND RWY 32 ILS MOB (111.5) WITHOUT SUCCESS. TOLD CTLR WE WOULD ATTEMPT VOR RWY 18 DOWNTOWN BUT VOR SIGNAL REMAINED UNRELIABLE. ON THIS ATTEMPT, WE SAW MOBILE REGIONAL VISUALLY BUT WAS TOO HIGH TO MAKE VISUAL APCH AND LNDG. CAPT ELECTED TO VECTOR S AND SET UP FOR VISUAL APCH AND LNDG AT MOB DUE TO UNRELIABLE ACFT NAVAIDS. TO DIVERT TO DESIGNATED ALTERNATE (NEW ORLEANS) WOULD HAVE REQUIRED US TO ENTER IMC CONDITIONS WITH UNRELIABLE NAVAIDS. AFTER SHUTDOWN, WE RECYCLED ALL NAVAID CIRCUIT BREAKERS. WE THEN GND TESTED VOR (SEMMES) AND ILS RWY 32 MOB (111.5) WITH SUCCESS. ELECTED TO LAUNCH BACK TO BFM ONCE APCH CTL WAS UP AND OPERATIONAL AND COULD PROVIDE AN ASR IF ILS/VOR STILL QUESTIONABLE.
Data retrieved from NASA's ASRS site as of July 2007 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.