APCH TO SHORT RWY ABANDONED BY MD88 WHEN FLAPS FAIL TO EXTEND TO LNDG SETTING. DIVERT TO ARPT WITH LONGER RWYS.

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ESTABLISHED ON FINAL APCH COURSE ILS RWY 22 AT ZZZ; OUTSIDE OF THE MARKER AT 180 KIAS; FLAPS 11 DEGS. CALLED FOR FLAPS 15 DEGS COMING UP ON GS. FLAPS DID NOT COME DOWN FROM 11 DEGS WITH HANDLE AT 15 DEG POS. DIVISION OF DUTIES ESTABLISHED BTWN CAPT (PF AND RADIOS) AND FO (QRH). AFTER LEVELING AT ASSIGNED MISSED APCH ALT (3000 FT) AND HDG; REQUESTED AND OBTAINED VECTOR TO ZZZ2 FOR A LONG RWY. QRH ABNORMAL FLAP CONFIGN PROCS COMPLIED WITH; FLT ATTENDANTS AND PAX NOTIFIED OF FLAP CONFIGN REQUIRING LONGER RWY AND DIVERSION TO ZZZ2; DISPATCHER SENT ACARS OF DIVERT INTENTION. EMER WAS NOT DECLARED; AS FUEL STATE WAS ADEQUATE AND ACCEPTABLE GIVEN THE EXCELLENT VECTOR TO FINAL APCH ILS. WHEN ASKED BY APCH (TWR?) IF EMER VEHICLES REQUESTED; RESPONDED 'AFFIRMATIVE; AT THE ROLLOUT END OF THE RWY.' FLEW QRH NON-NORMAL CONFIGN APCH/THRESHOLD SPD TO A SOFT TOUCHDOWN; NORMAL ROLLOUT AND EXIT R TURN ON TXWY. VEHICLES THANKED AND DISMISSED. CONTINUED TO GATE (FUEL 6.5). PAX DEPLANED FOR BUS RIDE TO ZZZ.