B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 207.37; Flight Crew Total 10924.42; Flight Crew Type 4431.73
Troubleshooting; Situational Awareness; Human-Machine Interface; Communication Breakdown; Training / Qualification
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance
Flight Crew Overcame Equipment Problem; General Maintenance Action
Aircraft; Procedure; MEL; Human Factors
After Wing Body Overheat light for left wing; we complied with QRH and made appropriate write up. Shortly after the write up; we received a request from ZZZ Maintenance; to help their troubleshooting. On the surface; seemed logical. However; their request would have violated at least two (2) system limitations.  Namely running two packs from 1 engine bleed source; and/or using APU air above limitations. Number of newly ordained 737 Captains requires more prudent approach.
B737 Captain reported violations of two systems limitations when a Wing/Body Overheat Light illuminated in flight.