| Parameter | Required (Vahan 4 139 2) | Observed | Status | |-----------|--------------------------|----------|--------| | Torque (N·m) | 140 ± 5 | 141 | Pass | | Lock washer deformation | <0.2 mm | 0.18 mm | Pass | | Fastener thread condition | No galling | No galling | Pass | | Inspection interval (hours) | 500 | 520 | Minor deviation |
Hold Low A (3 holes covered) for a full breath. Fade the volume from silence to mf (mezzo-forte) and back to silence. Repeat on Low A , but add a gentle vibrato at the peak of the volume. vahan 4 139 2