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Flight crew of an medium large transport experienced HSI heading indication failure when starting a holding pattern and declared an emergency. Subsequently, the emergency was canceled when changing to another navigation system mode.
| Attributes | |
| ACN | 324696 |
| Time | |
| Date | 199512 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sps |
| State Reference | TX |
| Altitude | msl bound lower : 18000 msl bound upper : 18000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 324696 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Declared emergency. Just prior to entering hold at sps on the boids 5, heading flag appeared on captain's HSI while on the navigation mode. Headings were 60 degrees off. ONS (omega navigational system) failed. WX was 500 and 1 1/2 at dfw. Declared an emergency. 5 mins later restored HSI in the radial mode. Retracted the emergency status.
Original NASA ASRS Text
Title: FLC OF AN MLG EXPERIENCED HSI HEADING INDICATION FAILURE WHEN STARTING A HOLDING PATTERN AND DECLARED AN EMER. SUBSEQUENTLY, THE EMER WAS CANCELED WHEN CHANGING TO ANOTHER NAV SYS MODE.
Narrative: DECLARED EMER. JUST PRIOR TO ENTERING HOLD AT SPS ON THE BOIDS 5, HEADING FLAG APPEARED ON CAPT'S HSI WHILE ON THE NAV MODE. HEADINGS WERE 60 DEGS OFF. ONS (OMEGA NAVIGATIONAL SYS) FAILED. WX WAS 500 AND 1 1/2 AT DFW. DECLARED AN EMER. 5 MINS LATER RESTORED HSI IN THE RADIAL MODE. RETRACTED THE EMER STATUS.
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.