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EMB190 flight crew experienced an APU generator failure after being dispatched with the number one engine generator on MEL. The crew elected to divert to a suitable airport which was slow in switching the ILS to the runway requested resulting in reverse sensing and an unstabilized approach to 900 feet AGL.
| Attributes | |
| ACN | 1381086 |
| Time | |
| Date | 201608 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 190/195 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | AC Generator/Alternator |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | ATC Issue All Types Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Inflight Event / Encounter Unstabilized Approach |
Narrative:
Aircraft had MEL 24-4; #1 idg (integrated drive generator) inop. We complied with the MEL and had the APU running. During the initial climb out through 3;000 ft; APU gen off bus caution message annunciated. The captain ran the QRH and the APU returned to normal. Around 17;000 ft the message returned. We then elected to advise ATC and divert to ZZZ. During the approach we noticed reverse sensing on the ILS so I disconnected the autopilot. I continued to monitor our DME using GPS and PAPI. The glide slope and PAPI are not coincident. Around 1500 ft on final tower switched to the correct ILS where we noticed we were 1 dot high. I corrected back using electronic means but caused us to descend at 1100 FPM through 1000 ft. We decided due to the nature of the situation it was imperative to continue the approach and land. We were stabilized by 900 AGL. The unstable approach was caused by the lack of electronic guidance until just prior to 1000 AGL.
Original NASA ASRS Text
Title: EMB190 flight crew experienced an APU generator failure after being dispatched with the number one engine generator on MEL. The crew elected to divert to a suitable airport which was slow in switching the ILS to the runway requested resulting in reverse sensing and an unstabilized approach to 900 feet AGL.
Narrative: Aircraft had MEL 24-4; #1 IDG (Integrated Drive Generator) inop. We complied with the MEL and had the APU running. During the initial climb out through 3;000 ft; APU GEN OFF BUS CAUTION MESSAGE annunciated. The captain ran the QRH and the APU returned to normal. Around 17;000 ft the message returned. We then elected to advise ATC and divert to ZZZ. During the approach we noticed reverse sensing on the ILS so I disconnected the autopilot. I continued to monitor our DME using GPS and PAPI. The glide slope and PAPI are not coincident. Around 1500 ft on final tower switched to the correct ILS where we noticed we were 1 dot high. I corrected back using electronic means but caused us to descend at 1100 FPM through 1000 ft. We decided due to the nature of the situation it was imperative to continue the approach and land. We were stabilized by 900 AGL. The unstable approach was caused by the lack of electronic guidance until just prior to 1000 AGL.
Data retrieved from NASA's ASRS site 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.