Flight crew reported #1 thrust reverser deployed at 500 ft. on departure. Crew shut engine down per reverser deployed' checklist and returned to field.
Synopsis
Flight crew reported #1 thrust reverser deployed at 500 ft. on departure. Crew shut engine down per reverser deployed' checklist and returned to field.
Narrative
Climbing out of ZZZZ; First Officer (FO) leg; passing 500 ft. AGL; aircraft experienced sudden and significant air frame buffeting/vibration; and inability to climb or accelerate. Initial priority was to ensure aircraft did not descend or lose airspeed. FO stated that they required full right rudder. I took control of the aircraft; applying 5 degrees of manual rudder trim and FO selected the confirm engine out prompt. Level 1; REV 1 PRESS FAULT illuminated; in addition to red indication on #1 N1 gauge which was indicating 25%. We [requested priority handling]; stating an issue with #1 engine. We were able to begin acceleration; climb; and cleanup. At 3000 ft. AGL; clean; 230 KIAS; significant vibration continued. Performed QRH procedure for reverser deployed or U/L or rev displayed in flight; which required shut down of #1 engine. Next; performed engine shutdown in flight checklist. Next; we reviewed the engine fire severe damage checklist; and determined that we could slow to 220 KIAS as our minimum clean airspeed; reducing some airframe vibration. Returned to ZZZZ for an uneventful landing. Maintenance determined that the #1 engine inboard reverser had fully deployed. Suspect #1 engine was operating at 25% reverse thrust until shut down.
Second reporter narrative
We experienced an engine #1 failure on initial climb out departing out of ZZZZ. After passing 500 ft. and selecting PROF; the aircraft immediately banked to the left and was accompanied by a continuous moderate aircraft buffeting/vibration. A quick glance on the engine N1 gauges presented a red U/L indication on engine #1 and was operating in the 25-30% range. The other indication we received was a REV 1 PRESS FAULT level 1 message. I immediately applied the right aileron to counter the left wing drop and applied an appropriate amount of right rudder and rudder trim accordingly to stabilize the aircraft. Adjustments were made to control speed and climbout rate. After we fully realized what was happening; the Captain took control of the aircraft. I advised them; prior to exchanging flight controls; that I had full right rudder input. Upon exchanging flight controls; we [requested priority handling] with ZZZZ Tower. We quickly referenced the QRH for the REV 1 PRESS FAULT level 1 message. We then referred to the reverser deployed or U/L or rev displayed inflight checklist. This led us to bring the affected engine throttle to idle and an eventual shutdown of the #1 engine. We also referenced the engine shutdown inflight checklist. To ascertain that everything was covered concerning any engine damage; we also referred to the engine fire or severe damage checklist. However; we did not discharge any fire bottles as it was not warranted. We executed a successful flaps 35 landing on Runway XX. ZZZZ airport fire department performed a visual inspection of our #1 engine on Taxiway 1. They were able to confirm no visible damages or leaks to the engine. However; they did inform us that the thrust reverser was in the open position. ZZZZ Line Maintenance later confirmed that the #1 inboard thrust reverser was fully deployed in the open position.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.