Narrative:

At about the time of the 80 KT call on the takeoff roll the first officer stated, 'I have no airspeed.' I took my eyes off the runway and looked inside at my indicated airspeed. It took me a couple of seconds to establish that I also had no airspeed and I said, 'I don't either.' then I looked outside to see how much runway was left, I glanced at the standby airspeed and saw both 100 KTS and 120 KTS, and I elected to continue as the safest course of action. Unfortunately, once airborne, I had several abnormal warnings happen at once and I realized that I had no airspeed, altimeter, vertical speed, or pitch. I declared an emergency. Having departed runway 28R at pit, tower said, 'roger, flight xx turn right for right traffic for runway 28R.' I leveled off at 1500 ft AGL on the radar altimeter. Using primarily visual cues, but using the standby instruments as back-up, I flew the right hand traffic pattern and made a normal visual approach to runway 28R followed by a normal landing (although overweight) using normal reverse and normal brakes. Upon maintenance inspection it was found that, during a 'string check' the night before, maintenance had neglected to 'plug in' the air data computers. Supplemental information from acn 304105: it also troubles me that there is no cockpit indication that the pitot-static system is hooked up. On the surface, we thought we had only lost airspeed, not both air data computers and associated system. There should be some light or warning. Maintenance said this is the 3RD time this has happened. Had the WX been IFR, I would have been adamant about rejecting the takeoff. Supplemental information from acn 303904:I installed the radio rack. Someone then called me over with a question about the engine change. I then returned to install the computers. There were no streamers or markings on any lines taken off the radio rack or computers. When I installed the air data computer I thought I would also check to see if they needed a chkout. I checked the maintenance manual and there were no checks required the air data computer had quick disconnects. I was interrupted several times that night I must have failed to connect the lines to the front of the air data computer boxes. The connections must have been tied out of sight with no streamers. I realize this was a serious mistake. I deeply regret that this situation happened. Supplemental information from acn 304312:I knew there were some avionics removed from the 'east and east' compartment where the stringer repair took place. When I closed out the OM-7 and the logbook I knew company procedure was, for the line department to re-install anything they had removed, so the sheet metal department could accomplish the repair. Anything that they remove and then re-install is logged on a form 'me-189.' so I felt confident in the company procedure to sign the OM-7 and logbook. After my own investigation, I found out the OM-7 and the me-189 forms were missing from our logs and records department. No accountability for the air data computer removal and re-installation has been claimed.

Related reports:

Google
 

Original NASA ASRS Text

Title: DURING TKOF FOLLOWING STATIC PWR SET PROC, AN F-100 FLC DISCOVERED THAT THERE WERE NO AIRSPD INDICATIONS. THE FLC CONTINUED TKOF (NOW, PAST 100 KTS), DISCOVERED NUMEROUS FAILURES, AND RETURNED TO LAND. LINE MAINT CLAIMED GUILT.

Narrative: AT ABOUT THE TIME OF THE 80 KT CALL ON THE TKOF ROLL THE FO STATED, 'I HAVE NO AIRSPD.' I TOOK MY EYES OFF THE RWY AND LOOKED INSIDE AT MY INDICATED AIRSPD. IT TOOK ME A COUPLE OF SECONDS TO ESTABLISH THAT I ALSO HAD NO AIRSPD AND I SAID, 'I DON'T EITHER.' THEN I LOOKED OUTSIDE TO SEE HOW MUCH RWY WAS LEFT, I GLANCED AT THE STANDBY AIRSPD AND SAW BOTH 100 KTS AND 120 KTS, AND I ELECTED TO CONTINUE AS THE SAFEST COURSE OF ACTION. UNFORTUNATELY, ONCE AIRBORNE, I HAD SEVERAL ABNORMAL WARNINGS HAPPEN AT ONCE AND I REALIZED THAT I HAD NO AIRSPD, ALTIMETER, VERT SPD, OR PITCH. I DECLARED AN EMER. HAVING DEPARTED RWY 28R AT PIT, TWR SAID, 'ROGER, FLT XX TURN R FOR R TFC FOR RWY 28R.' I LEVELED OFF AT 1500 FT AGL ON THE RADAR ALTIMETER. USING PRIMARILY VISUAL CUES, BUT USING THE STANDBY INSTS AS BACK-UP, I FLEW THE R HAND TFC PATTERN AND MADE A NORMAL VISUAL APCH TO RWY 28R FOLLOWED BY A NORMAL LNDG (ALTHOUGH OVERWT) USING NORMAL REVERSE AND NORMAL BRAKES. UPON MAINT INSPECTION IT WAS FOUND THAT, DURING A 'STRING CHK' THE NIGHT BEFORE, MAINT HAD NEGLECTED TO 'PLUG IN' THE AIR DATA COMPUTERS. SUPPLEMENTAL INFO FROM ACN 304105: IT ALSO TROUBLES ME THAT THERE IS NO COCKPIT INDICATION THAT THE PITOT-STATIC SYS IS HOOKED UP. ON THE SURFACE, WE THOUGHT WE HAD ONLY LOST AIRSPD, NOT BOTH AIR DATA COMPUTERS AND ASSOCIATED SYS. THERE SHOULD BE SOME LIGHT OR WARNING. MAINT SAID THIS IS THE 3RD TIME THIS HAS HAPPENED. HAD THE WX BEEN IFR, I WOULD HAVE BEEN ADAMANT ABOUT REJECTING THE TKOF. SUPPLEMENTAL INFO FROM ACN 303904:I INSTALLED THE RADIO RACK. SOMEONE THEN CALLED ME OVER WITH A QUESTION ABOUT THE ENG CHANGE. I THEN RETURNED TO INSTALL THE COMPUTERS. THERE WERE NO STREAMERS OR MARKINGS ON ANY LINES TAKEN OFF THE RADIO RACK OR COMPUTERS. WHEN I INSTALLED THE ADC I THOUGHT I WOULD ALSO CHK TO SEE IF THEY NEEDED A CHKOUT. I CHKED THE MAINT MANUAL AND THERE WERE NO CHKS REQUIRED THE ADC HAD QUICK DISCONNECTS. I WAS INTERRUPTED SEVERAL TIMES THAT NIGHT I MUST HAVE FAILED TO CONNECT THE LINES TO THE FRONT OF THE ADC BOXES. THE CONNECTIONS MUST HAVE BEEN TIED OUT OF SIGHT WITH NO STREAMERS. I REALIZE THIS WAS A SERIOUS MISTAKE. I DEEPLY REGRET THAT THIS SIT HAPPENED. SUPPLEMENTAL INFO FROM ACN 304312:I KNEW THERE WERE SOME AVIONICS REMOVED FROM THE 'E AND E' COMPARTMENT WHERE THE STRINGER REPAIR TOOK PLACE. WHEN I CLOSED OUT THE OM-7 AND THE LOGBOOK I KNEW COMPANY PROC WAS, FOR THE LINE DEPT TO RE-INSTALL ANYTHING THEY HAD REMOVED, SO THE SHEET METAL DEPT COULD ACCOMPLISH THE REPAIR. ANYTHING THAT THEY REMOVE AND THEN RE-INSTALL IS LOGGED ON A FORM 'ME-189.' SO I FELT CONFIDENT IN THE COMPANY PROC TO SIGN THE OM-7 AND LOGBOOK. AFTER MY OWN INVESTIGATION, I FOUND OUT THE OM-7 AND THE ME-189 FORMS WERE MISSING FROM OUR LOGS AND RECORDS DEPT. NO ACCOUNTABILITY FOR THE ADC REMOVAL AND RE-INSTALLATION HAS BEEN CLAIMED.

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.