Approach and Landing Tests List of ALT flights List of ALT flights

| Test_flight | Date_ | Speed | Altitude | Crew | Duration | Comment_ |
|---|---|---|---|---|---|---|
| Captive-inert flight #3 | February 25, 1977 | mph (km/h) | 26,600ft 8,108 m | none | 2 h 28min | Tailcone on, landed with 747 |
| Captive-inert flight #4 | February 28, 1977 | mph (km/h) | 28,565ft 8,707 m | none | 2 h 11min | Tailcone on, landed with 747 |
| Captive-inert flight #5 | March 2, 1977 | mph (km/h) | 30,000ft 9,144 m | none | 1 h 39min | Tailcone on, landed with 747 |
| Captive-active flight #1 | June 18, 1977 | mph (km/h) | 14,970ft 4,563 m | Haise , Fullerton | 55min 46 s | Tailcone on, landed with 747 |
| Captive-active flight #2 | June 28, 1977 | mph (km/h) | 22,030ft 6,715 m | Engle , Truly | 62min 0 s | Tailcone on, landed with 747 |