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A DC8 in cruise at FL290 declared an emergency and diverted due to a complete pitot static system failure.
| Attributes | |
| ACN | 400484 |
| Time | |
| Date | 199804 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : usr |
| State Reference | FO |
| Altitude | msl bound lower : 29000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : mia |
| Operator | common carrier : air carrier |
| Make Model Name | DC-8 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other other other |
| Route In Use | enroute airway : mxha |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 272 flight time total : 15800 flight time type : 8000 |
| ASRS Report | 400484 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument pilot : cfi |
| Experience | flight time last 90 days : 160 flight time total : 3400 |
| ASRS Report | 400726 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Complete pitot static system failure. Captain's and first officer's altimeter, vsi, airspeed indicator were unreliable and each side indicated conflicting parameters. Declared ATC emergency with ZMA. Also dumped fuel, 20000 pounds fuel over uncongested area. Landed at mia without incident. Callback conversation with reporter revealed the following information: the reporter stated the pitot static system had been worked by maintenance for several hours prior to departure. The reporter said the failure was a broken static pressure line common to the captain's and the first officer's altimeter, vsi indicators, and airspeed indicators. The reporter stated the broken line while common to both system did not introduce the same error to both system causing a conflict.
Original NASA ASRS Text
Title: A DC8 IN CRUISE AT FL290 DECLARED AN EMER AND DIVERTED DUE TO A COMPLETE PITOT STATIC SYS FAILURE.
Narrative: COMPLETE PITOT STATIC SYS FAILURE. CAPT'S AND FO'S ALTIMETER, VSI, AIRSPD INDICATOR WERE UNRELIABLE AND EACH SIDE INDICATED CONFLICTING PARAMETERS. DECLARED ATC EMER WITH ZMA. ALSO DUMPED FUEL, 20000 LBS FUEL OVER UNCONGESTED AREA. LANDED AT MIA WITHOUT INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE PITOT STATIC SYS HAD BEEN WORKED BY MAINT FOR SEVERAL HRS PRIOR TO DEP. THE RPTR SAID THE FAILURE WAS A BROKEN STATIC PRESSURE LINE COMMON TO THE CAPT'S AND THE FO'S ALTIMETER, VSI INDICATORS, AND AIRSPD INDICATORS. THE RPTR STATED THE BROKEN LINE WHILE COMMON TO BOTH SYS DID NOT INTRODUCE THE SAME ERROR TO BOTH SYS CAUSING A CONFLICT.
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.