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An airbus 319 turning on final approach at 1000 ft lost all navigation inputs, ILS information and GPS primary display caused by #1 inertial reference unit.
| Attributes | |
| ACN | 454156 |
| Time | |
| Date | 199911 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : pit.airport |
| State Reference | PA |
| Altitude | agl single value : 1000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : pit.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : multi engine pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 13000 flight time type : 39 |
| ASRS Report | 454156 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Final approach. 1) turning onto final from a right base to runway 28R pit, mcdu completely dropped navigation inputs and ILS information display (nd -- GPS primary lost). I dialed the localizer frequency and course selection into the standby navigation and continued the approach. 2) below 1000 ft a continuous 'terrain, pull up' was generated on GPWS (aural warning) with a corresponding pb lt indication -- being visual I turned off the GPWS terrain pb and landed the aircraft visually. 3) automatic brakes selected low for landing. After landing when brakes were released via depressing the brake pedals cockpit indication remained on, I had to manually turn the low brake pb off. 4) parking checklist adirs check -- out of tolerance for flight time 3 hours 42 mins -- IRS #1 8.0, IRS #2 10.5, IRS #3 10.0. After maintenance inspected aircraft, certified for flight, during pushback bwi FM/GPS position disagreement ECAM, returned to the gate maintenance MEL's mmr #1 for it was inoperative.
Original NASA ASRS Text
Title: AN AIRBUS 319 TURNING ON FINAL APCH AT 1000 FT LOST ALL NAV INPUTS, ILS INFO AND GPS PRIMARY DISPLAY CAUSED BY #1 INERTIAL REF UNIT.
Narrative: FINAL APCH. 1) TURNING ONTO FINAL FROM A R BASE TO RWY 28R PIT, MCDU COMPLETELY DROPPED NAV INPUTS AND ILS INFO DISPLAY (ND -- GPS PRIMARY LOST). I DIALED THE LOC FREQ AND COURSE SELECTION INTO THE STANDBY NAV AND CONTINUED THE APCH. 2) BELOW 1000 FT A CONTINUOUS 'TERRAIN, PULL UP' WAS GENERATED ON GPWS (AURAL WARNING) WITH A CORRESPONDING PB LT INDICATION -- BEING VISUAL I TURNED OFF THE GPWS TERRAIN PB AND LANDED THE ACFT VISUALLY. 3) AUTO BRAKES SELECTED LOW FOR LNDG. AFTER LNDG WHEN BRAKES WERE RELEASED VIA DEPRESSING THE BRAKE PEDALS COCKPIT INDICATION REMAINED ON, I HAD TO MANUALLY TURN THE LOW BRAKE PB OFF. 4) PARKING CHKLIST ADIRS CHK -- OUT OF TOLERANCE FOR FLT TIME 3 HRS 42 MINS -- IRS #1 8.0, IRS #2 10.5, IRS #3 10.0. AFTER MAINT INSPECTED ACFT, CERTIFIED FOR FLT, DURING PUSHBACK BWI FM/GPS POS DISAGREEMENT ECAM, RETURNED TO THE GATE MAINT MEL'S MMR #1 FOR IT WAS INOP.
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.