Narrative:

During climb, aircraft incurred numerous instrument failures including navigation, airspeed, autoplt, attitude/turn, and altimeter failures. ATC advised of inability to report correct altitude. Pom abnormals completed and system partially restored. Flight continued using alternate speed and altitude system, and ATC advised of possible inaccuracies. Flight was uneventful from this point, however, since ATC gets altitude reporting electronically and that was the inoperative system, we filed NASA reports to explain any questions ATC/FAA might have. In my opinion, the alternate system were operating normally but ATC was probably getting bad altitude readouts. As a line check airman I had hoped to teach the new hire first officer something useful on his IOE. This, however, was more than either of us bargained for. Supplemental information from acn 402753: alternate static source was selected by captain and problem seemed to clear. Once problem seemed to clear, discussed situation. Captain called maintenance and dispatch. Flight continued to atl for uneventful landing. VMC conditions throughout entire flight.

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Original NASA ASRS Text

Title: FLC OF AN MD88 EXPERIENCED ERRATIC OP OF NUMEROUS INSTS, INCLUDING THE AUTOPLT SYS, DURING CLB CAUSING QUESTIONABLE ALT READINGS INDICATED VIA XPONDER TO ATC. ATC APCH AND CTR WERE ADVISED OF DIFFICULTY. THE PROB SEEMED TO BE CORRECTED AFTER SWITCHING TO THE ALTERNATE STATIC SOURCE. CONTINUED TO DEST.

Narrative: DURING CLB, ACFT INCURRED NUMEROUS INST FAILURES INCLUDING NAV, AIRSPD, AUTOPLT, ATTITUDE/TURN, AND ALTIMETER FAILURES. ATC ADVISED OF INABILITY TO RPT CORRECT ALT. POM ABNORMALS COMPLETED AND SYS PARTIALLY RESTORED. FLT CONTINUED USING ALTERNATE SPD AND ALT SYS, AND ATC ADVISED OF POSSIBLE INACCURACIES. FLT WAS UNEVENTFUL FROM THIS POINT, HOWEVER, SINCE ATC GETS ALT RPTING ELECTRONICALLY AND THAT WAS THE INOP SYS, WE FILED NASA RPTS TO EXPLAIN ANY QUESTIONS ATC/FAA MIGHT HAVE. IN MY OPINION, THE ALTERNATE SYS WERE OPERATING NORMALLY BUT ATC WAS PROBABLY GETTING BAD ALT READOUTS. AS A LINE CHK AIRMAN I HAD HOPED TO TEACH THE NEW HIRE FO SOMETHING USEFUL ON HIS IOE. THIS, HOWEVER, WAS MORE THAN EITHER OF US BARGAINED FOR. SUPPLEMENTAL INFO FROM ACN 402753: ALTERNATE STATIC SOURCE WAS SELECTED BY CAPT AND PROB SEEMED TO CLR. ONCE PROB SEEMED TO CLR, DISCUSSED SIT. CAPT CALLED MAINT AND DISPATCH. FLT CONTINUED TO ATL FOR UNEVENTFUL LNDG. VMC CONDITIONS THROUGHOUT ENTIRE FLT.

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.