Narrative:

During climb out phase we requested and were cleared to leveloff at FL270 (originally filed altitude was FL330). We experienced light to moderate turbulence during the climb out above 4500 ft. This trip was part of an initial IOE for the first officer and the aircraft was equipped with an older sp-50 autoplt that has no altitude capture capability. The first officer was flying the aircraft and correcting back to course. I was observing the manually controled leveloff when we received a frequency change from center. (I had made the procedurally required 'out of FL260 for FL270' callout as we transitioned through FL260.) while I was responding to the radio call, the aircraft continued to climb up to FL274 until the flight engineer verbally called out the altitude excursion problem. We probably climbed to FL275 before rapidly returning to our cleared to FL270. ATC did not acknowledge the problem and we continued on to atlanta without further incident. I feel that major contributing factors to this problem are the mixed autoplt configns utilized at air carrier a and the fact that none of the air carrier a B727 simulators are equipped with the older non altitude capture autoplts. (Approximately half of air carrier a B727 fleet have the older autoplts.) supplemental information from acn 390578: WX was bad with light to moderate turbulence for the whole climb. We were also being blown north of course. I began a course correction and forgot about the leveloff until so said altitude as we passed FL274. I immediately stopped the climb and began a descent. The captain took control of the airplane and aggressively descended us back to FL270.

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Original NASA ASRS Text

Title: B727-200 ACFT IN CLB WITH NEW FO FLYING ON IOE OVERSHOT ALT BY 500 FT. CAPT RPTR WAS DISTRACTED WITH ATC COM, BUT SO CALLED OUT ALT.

Narrative: DURING CLBOUT PHASE WE REQUESTED AND WERE CLRED TO LEVELOFF AT FL270 (ORIGINALLY FILED ALT WAS FL330). WE EXPERIENCED LIGHT TO MODERATE TURB DURING THE CLBOUT ABOVE 4500 FT. THIS TRIP WAS PART OF AN INITIAL IOE FOR THE FO AND THE ACFT WAS EQUIPPED WITH AN OLDER SP-50 AUTOPLT THAT HAS NO ALT CAPTURE CAPABILITY. THE FO WAS FLYING THE ACFT AND CORRECTING BACK TO COURSE. I WAS OBSERVING THE MANUALLY CTLED LEVELOFF WHEN WE RECEIVED A FREQ CHANGE FROM CTR. (I HAD MADE THE PROCEDURALLY REQUIRED 'OUT OF FL260 FOR FL270' CALLOUT AS WE TRANSITIONED THROUGH FL260.) WHILE I WAS RESPONDING TO THE RADIO CALL, THE ACFT CONTINUED TO CLB UP TO FL274 UNTIL THE FE VERBALLY CALLED OUT THE ALT EXCURSION PROB. WE PROBABLY CLBED TO FL275 BEFORE RAPIDLY RETURNING TO OUR CLRED TO FL270. ATC DID NOT ACKNOWLEDGE THE PROB AND WE CONTINUED ON TO ATLANTA WITHOUT FURTHER INCIDENT. I FEEL THAT MAJOR CONTRIBUTING FACTORS TO THIS PROB ARE THE MIXED AUTOPLT CONFIGNS UTILIZED AT ACR A AND THE FACT THAT NONE OF THE ACR A B727 SIMULATORS ARE EQUIPPED WITH THE OLDER NON ALT CAPTURE AUTOPLTS. (APPROX HALF OF ACR A B727 FLEET HAVE THE OLDER AUTOPLTS.) SUPPLEMENTAL INFO FROM ACN 390578: WX WAS BAD WITH LIGHT TO MODERATE TURB FOR THE WHOLE CLB. WE WERE ALSO BEING BLOWN N OF COURSE. I BEGAN A COURSE CORRECTION AND FORGOT ABOUT THE LEVELOFF UNTIL SO SAID ALT AS WE PASSED FL274. I IMMEDIATELY STOPPED THE CLB AND BEGAN A DSCNT. THE CAPT TOOK CTL OF THE AIRPLANE AND AGGRESSIVELY DSNDED US BACK TO FL270.

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.