Hi HazelNuts39,
How did he manage to maintain 15° NU until he also lost longitudinal control?
Probably by following these erroneous FD commands.
Time FD MODE
2 h 10 min 08 ALT CRZ HDG
2 h 10 min 08 - 17
2 h 10 min 17 - 21 ALT CRZ * HDG
2 h 10 min 21 - 26
2 h 10 min 26 - 36 V/S +6000 HDG
2 h 10 min 36 - 42
2 h 10 min 42 - 43 V/S +1400 HDG
2 h 10 min 43 - 47
2 h 10 min 47 - 2 h 11 min 40 V/S +1400 HDG
2 h 11 min 40 - 2 h 12 min 52
2 h 12 min 52 - 2 h 12 min 58 V/S +1400 HDG
2 h 12 min 58 - 2 h 13 min 57
2 h 13 min 57 - 2 h 13 min 58 Not recorded- period of associated
parameter sampling insufficient
2 h 13 min 58 s - end of flight
See Page 95 Final report.
Page 198 Conclusions:
"The Flight Directors did not disconnect.
The crossbars disappeared and then re-appeared on several occasions, changing mode several times."