Narrative:

Final approach turned us to a base leg for the runway xxr ILS. Descend to 5;000 speed 210. Then gave us a vector to join and gave us speed of 170. That vector put us above the glide slope. The ca called for gear down flaps 15 landing checklist to get us slow and to get down to the glide slope. Then approach asked us to slow to our final approach speed. Ca called 'flaps 30 final items.' about 9 miles out approach handed us to tower.tower said 'slow to final approach speed; you have a 30kt overtake on traffic 2.5 ahead; cleared to land.' the ca grabbed the flaps 40 speed from FMS; and called flaps 40 final items. I was setting flaps 40; as I read back to tower that we were slowed back all the way; cleared to land. Tower said; this isn't going to work (approximately 2;500 msl); 'go around; climb 4;000 heading 290'. I read that back to tower as the ca called 'toga; flaps 15; check thrust'. I set flaps 15 checked thrust; and I believe we both called positive rate. Ca 'gear up'. I brought the gear up set heading 290 and 4;000ft ca 'check missed approach altitude.' I said '4;000 set.'a horn started going off. I announced the a/P and silenced the horn (a/T was also disconnected). As I scanned back to monitor I noticed we were entering a uas [undesired aircraft state] and announced 'watch the pitch airspeed'. The ca said something (I couldn't make out what she said) was 'not working' and I assisted by pushing the yoke forward to lower the nose. The airplane also simultaneously announced 'airspeed low.' we proceeded on the missed approach and resequenced to land.

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Original NASA ASRS Text

Title: Air carrier flight crew reported ATC provided insufficient spacing during final approach causing the need for a go-around. Aircrew found aircraft in a slow condition during the go-around procedure.

Narrative: Final Approach turned us to a base leg for the Runway XXR ILS. Descend to 5;000 speed 210. Then gave us a vector to join and gave us speed of 170. That vector put us above the glide slope. The CA called for gear down Flaps 15 landing checklist to get us slow and to get down to the glide slope. Then approach asked us to slow to our final approach speed. CA called 'flaps 30 final items.' About 9 miles out approach handed us to tower.Tower said 'slow to final approach speed; you have a 30kt overtake on traffic 2.5 ahead; cleared to land.' The CA grabbed the flaps 40 speed from FMS; and called flaps 40 final items. I was setting flaps 40; as I read back to tower that we were slowed back all the way; cleared to land. Tower said; this isn't going to work (approximately 2;500 msl); 'go around; climb 4;000 heading 290'. I read that back to tower as the CA called 'TOGA; FLAPS 15; check thrust'. I set flaps 15 checked thrust; and I believe we both called positive rate. CA 'GEAR UP'. I brought the gear up set heading 290 and 4;000ft CA 'CHECK MISSED APPROACH ALTITUDE.' I said '4;000 set.'A horn started going off. I announced the A/P and silenced the horn (A/T was also disconnected). As I scanned back to monitor I noticed we were entering a UAS [Undesired Aircraft State] and announced 'watch the PITCH AIRSPEED'. The CA said something (I couldn't make out what she said) was 'not working' and I assisted by pushing the yoke forward to lower the nose. The airplane also simultaneously announced 'airspeed low.' We proceeded on the missed approach and resequenced to land.

Data retrieved from NASA's ASRS site 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.