S80 dfw pressurization problems on climb out returns to departure field.

Attributes
ACN	442290
Time
Date	199907
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	msl single value : 26000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain
Qualification	pilot : atp
ASRS Report	442290
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer observation : company check pilot oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : landed as precaution flight crew : diverted to another airport flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Dfw to lga with check airman on last leg of captain upgrade IOE. During climb through FL260 observed cabin climbing at high rate with low pressure indications on the packs. Stopped climb and received clearance from ftw to descend to 10000 ft. The flow light illuminated shortly thereafter. Abnormal procedures for the conditions and flow light was accomplished which led to emergency descent procedure. The descent, approach and landing at dfw was performed without incident and well below maximum landing weight. Flight conditions were day/VFR with scattered cumulus throughout departure and arrival corridors. No icing conditions were encountered and only very light chop was experienced. Cockpit coordination was excellent. Flight attendants were extremely professional and prepared. They received very high praises from our passenger. My sincere appreciation and congratulations for the excellent performance of their duties and a job well done to the flight attendants. Almost all passenger thanked us for the flight to lga. My thanks to check airman for his support and professionalism.

Original NASA ASRS Text

Title: S80 DFW PRESSURIZATION PROBS ON CLBOUT RETURNS TO DEP FIELD.

Narrative: DFW TO LGA WITH CHK AIRMAN ON LAST LEG OF CAPT UPGRADE IOE. DURING CLB THROUGH FL260 OBSERVED CABIN CLBING AT HIGH RATE WITH LOW PRESSURE INDICATIONS ON THE PACKS. STOPPED CLB AND RECEIVED CLRNC FROM FTW TO DSND TO 10000 FT. THE FLOW LIGHT ILLUMINATED SHORTLY THEREAFTER. ABNORMAL PROCS FOR THE CONDITIONS AND FLOW LIGHT WAS ACCOMPLISHED WHICH LED TO EMER DSCNT PROC. THE DSCNT, APCH AND LNDG AT DFW WAS PERFORMED WITHOUT INCIDENT AND WELL BELOW MAX LNDG WT. FLT CONDITIONS WERE DAY/VFR WITH SCATTERED CUMULUS THROUGHOUT DEP AND ARR CORRIDORS. NO ICING CONDITIONS WERE ENCOUNTERED AND ONLY VERY LIGHT CHOP WAS EXPERIENCED. COCKPIT COORD WAS EXCELLENT. FLT ATTENDANTS WERE EXTREMELY PROFESSIONAL AND PREPARED. THEY RECEIVED VERY HIGH PRAISES FROM OUR PAX. MY SINCERE APPRECIATION AND CONGRATULATIONS FOR THE EXCELLENT PERFORMANCE OF THEIR DUTIES AND A JOB WELL DONE TO THE FLT ATTENDANTS. ALMOST ALL PAX THANKED US FOR THE FLT TO LGA. MY THANKS TO CHK AIRMAN FOR HIS SUPPORT AND PROFESSIONALISM.

Data retrieved from NASA's ASRS site as of July 2007 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.