Narrative:

During climb out from ZZZ; left CSD temperature exceeded redline. Accomplished QRH procedure; disconnected CSD. APU was placarded inoperative; reduced to single generator operation. Returned to land at nearest suitable (ZZZ). Declared emergency and landed overweight. Crash fire rescue equipment equipment followed us to gate and inspected brakes for overheat. Brake temperatures normal. Xferred to another aircraft for departure.

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Original NASA ASRS Text

Title: MD80 CAPT REPORTS CSD FAILURE ON DEPARTURE. RETURN FOR OVERWEIGHT LANDING IS ONLY OPTION WITH APU ON MEL.

Narrative: DURING CLBOUT FROM ZZZ; L CSD TEMP EXCEEDED REDLINE. ACCOMPLISHED QRH PROC; DISCONNECTED CSD. APU WAS PLACARDED INOP; REDUCED TO SINGLE GENERATOR OP. RETURNED TO LAND AT NEAREST SUITABLE (ZZZ). DECLARED EMER AND LANDED OVERWT. CFR EQUIP FOLLOWED US TO GATE AND INSPECTED BRAKES FOR OVERHEAT. BRAKE TEMPS NORMAL. XFERRED TO ANOTHER ACFT FOR DEP.

Data retrieved from NASA's ASRS site as of May 2009 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.