B737-300 crew had cabin altitude warning horn in tjsj class east airspace.

Attributes
ACN	492851
Time
Date	200011
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : tjsj.airport
State Reference	PR
Altitude	msl single value : 10000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sju.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	492851
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
ASRS Report	492850
Events
Anomaly	non adherence : company policies non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : cabin altitude warning horn other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact other
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Failure to turn packs on after engine start. First officer failed to put packs on after starting engines. Passing 10000 ft, cabin altitude warning horn sounded. We leveled and requested return to 10000 ft. Aircraft pressurized slowly. When normal, we continued flight. Recommend packs be placed on before takeoff checklist so captain can challenge and reply and thus back up first officer.

Original NASA ASRS Text

Title: B737-300 CREW HAD CABIN ALT WARNING HORN IN TJSJ CLASS E AIRSPACE.

Narrative: FAILURE TO TURN PACKS ON AFTER ENG START. FO FAILED TO PUT PACKS ON AFTER STARTING ENGS. PASSING 10000 FT, CABIN ALT WARNING HORN SOUNDED. WE LEVELED AND REQUESTED RETURN TO 10000 FT. ACFT PRESSURIZED SLOWLY. WHEN NORMAL, WE CONTINUED FLT. RECOMMEND PACKS BE PLACED ON BEFORE TKOF CHKLIST SO CAPT CAN CHALLENGE AND REPLY AND THUS BACK UP FO.

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.