During takeoff rotation, first officer, flying B737-300, noticed that his pitot static supplied instruments were reacting erratically. Flight control was turned over to the captain and the flight continued to destination. Company maintenance found that pitot static supply lines to the #2 air data computer were not connected.

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Attributes
ACN	355776
Time
Date	199612
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cos
State Reference	CO
Altitude	agl bound lower : 0 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff climbout : intermediate altitude climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 11000 flight time type : 1600
ASRS Report	355776
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 9700 flight time type : 850
ASRS Report	355670
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

A thorough preflight had been completed. The logbook indicated several maintenance write-ups for an avionics equipment cooling fan inoperative, which was repaired and replaced. The aircraft was signed off as airworthy. Approximately 10 mins later the aircraft departed runway 35R at cos. At approximately 80-90 KTS the first officer (PF) stated 'something doesn't seem right.' the aircraft was light and continued to accelerate to V1. I called V1-vr and the first officer rotated and departed. Once airborne the first officer stated, I have nothing over here. As we analyzed the situation it became apparent the first officer's panels were not functioning. I xferred control and became the PF. We continued to troubleshoot the problem with no results. We were by this time in cruise and over alamoso. Dispatch and maintenance control were notified and we elected to continue to phx. Arriving in phx without incident, the aircraft was inspected and the air data computer's air supply was found disconnected to the #2 computer. In changing the equipment cooling fan the air supply was disconnected to allow easy access and never reconnected. 3 mechanics worked on this fan and a supervisor signed off the aircraft. Continued work needed on crew communication. The first officer's unclr statements allowed the aircraft to become airborne. I was too fixated on my side of the aircraft.

Original NASA ASRS Text

Title: DURING TKOF ROTATION, FO, FLYING B737-300, NOTICED THAT HIS PITOT STATIC SUPPLIED INSTS WERE REACTING ERRATICALLY. FLT CTL WAS TURNED OVER TO THE CAPT AND THE FLT CONTINUED TO DEST. COMPANY MAINT FOUND THAT PITOT STATIC SUPPLY LINES TO THE #2 AIR DATA COMPUTER WERE NOT CONNECTED.

Narrative: A THOROUGH PREFLT HAD BEEN COMPLETED. THE LOGBOOK INDICATED SEVERAL MAINT WRITE-UPS FOR AN AVIONICS EQUIPMENT COOLING FAN INOP, WHICH WAS REPAIRED AND REPLACED. THE ACFT WAS SIGNED OFF AS AIRWORTHY. APPROX 10 MINS LATER THE ACFT DEPARTED RWY 35R AT COS. AT APPROX 80-90 KTS THE FO (PF) STATED 'SOMETHING DOESN'T SEEM RIGHT.' THE ACFT WAS LIGHT AND CONTINUED TO ACCELERATE TO V1. I CALLED V1-VR AND THE FO ROTATED AND DEPARTED. ONCE AIRBORNE THE FO STATED, I HAVE NOTHING OVER HERE. AS WE ANALYZED THE SIT IT BECAME APPARENT THE FO'S PANELS WERE NOT FUNCTIONING. I XFERRED CTL AND BECAME THE PF. WE CONTINUED TO TROUBLESHOOT THE PROB WITH NO RESULTS. WE WERE BY THIS TIME IN CRUISE AND OVER ALAMOSO. DISPATCH AND MAINT CTL WERE NOTIFIED AND WE ELECTED TO CONTINUE TO PHX. ARRIVING IN PHX WITHOUT INCIDENT, THE ACFT WAS INSPECTED AND THE AIR DATA COMPUTER'S AIR SUPPLY WAS FOUND DISCONNECTED TO THE #2 COMPUTER. IN CHANGING THE EQUIP COOLING FAN THE AIR SUPPLY WAS DISCONNECTED TO ALLOW EASY ACCESS AND NEVER RECONNECTED. 3 MECHS WORKED ON THIS FAN AND A SUPVR SIGNED OFF THE ACFT. CONTINUED WORK NEEDED ON CREW COM. THE FO'S UNCLR STATEMENTS ALLOWED THE ACFT TO BECOME AIRBORNE. I WAS TOO FIXATED ON MY SIDE OF THE ACFT.

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.