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ILS coupling during approach to 22L ewr resulted in oscillating pitch changes above 2000 feet.
| Attributes | |
| ACN | 1319991 |
| Time | |
| Date | 201512 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | EWR.Airport |
| State Reference | NJ |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Approach Coupler |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 163 Flight Crew Total 2365 Flight Crew Type 1387 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Vectored in at 3000 speed 170 knots with autopilot flying; cleared for the ILS 22L approach at ewr. The aircraft intercepted the localizer and then the GS while configured at flaps 20. At GS capture the aircraft pitched up abruptly (un-commanded) and then made an equal and opposite correction below to return to the GS; this continued in a series of decreasing magnitude of up and down in a wave to a point at 2000 where the whole thing washed out and a stable approach was flown to a landing. I have personally noted this event on nearly all arrivals within last 10 weeks and while flying all different versions of B75/6 aircraft; but this event was very similar to my last reported event. The pitch disturbance was great enough that my first officer seriously considered disconnecting the autopilot. But; again. All was well by 2000 feet.this event was bad enough to disturb my passengers; it needs to be addressed.
Original NASA ASRS Text
Title: ILS coupling during approach to 22L EWR resulted in oscillating pitch changes above 2000 feet.
Narrative: Vectored in at 3000 speed 170 knots with autopilot flying; cleared for the ILS 22L approach at EWR. The aircraft intercepted the LOC and then the GS while configured at flaps 20. At GS capture the aircraft pitched up abruptly (un-commanded) and then made an equal and opposite correction below to return to the GS; this continued in a series of decreasing magnitude of up and down in a wave to a point at 2000 where the whole thing washed out and a stable approach was flown to a landing. I have personally noted this event on nearly all arrivals within last 10 weeks and while flying all different versions of B75/6 aircraft; but this event was very similar to my last reported event. The pitch disturbance was great enough that my First Officer seriously considered disconnecting the autopilot. But; again. All was well by 2000 feet.This event was bad enough to disturb my passengers; it needs to be addressed.
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.