Narrative:

Right engine pressure ratio with auto throttles MEL. At 1;500 feet AGL [I] called for VNAV and it [would] not engage. Directed the first officer to troubleshoot the situation. At 3;000 we cleaned [up] the airplane and performed the after takeoff checklist; while getting vectors from departure with new altitude assignment. I was hand flying the airplane. VNAV still would not engage; directed the first officer to engage fltch and both tiles then engaged (green). First officer tried to disengage the VNAV mode; and it would not disengage. We leveled off at 14;000 with an overshoot of 200 feet; then finally at 14;000. I started to trouble shoot the situation. No EICAS. No status messages; no guidance on the QRH; even though we looked at it to see if we can find something. I was able to get the altitude hold mode and heading to work; after disconnecting the flight directors; then connected the autopilot. However; I forgot to pull the power back. We had a red indication on the egt (exhaust gas temperature). First officer called the anomaly; I pulled the power back on both engines; and condition was corrected. The engine over temp for less than 30 seconds before it was discovered. We continue to [destination] trying to troubleshoot the VNAV issue. We never got VNAV to work or fltch. Lowest level of automation was utilized; and I hand flew the airplane on descent and approach.

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Original NASA ASRS Text

Title: B757-200 flight crew reported they overshot a cleared altitude and exceeded temperature limitations on an engine while they were distracted by a VNAV issue.

Narrative: Right Engine Pressure Ratio with auto throttles MEL. At 1;500 feet AGL [I] called for VNAV and it [would] not engage. Directed the FO to troubleshoot the situation. At 3;000 we cleaned [up] the airplane and performed the after takeoff checklist; while getting vectors from departure with new altitude assignment. I was hand flying the airplane. VNAV still would not engage; directed the FO to engage FLTCH and both tiles then engaged (green). FO tried to disengage the VNAV mode; and it would not disengage. We leveled off at 14;000 with an overshoot of 200 feet; then finally at 14;000. I started to trouble shoot the situation. No EICAS. No status messages; no guidance on the QRH; even though we looked at it to see if we can find something. I was able to get the ALT hold mode and HDG to work; after disconnecting the flight directors; then connected the autopilot. However; I forgot to pull the power back. We had a red indication on the EGT (Exhaust Gas Temperature). FO called the anomaly; I pulled the power back on both engines; and condition was corrected. The engine over temp for less than 30 seconds before it was discovered. We continue to [destination] trying to troubleshoot the VNAV issue. We never got VNAV to work or FLTCH. Lowest level of automation was utilized; and I hand flew the airplane on descent and approach.

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.