E175 flight crew reported the loss of flight director presentations immediately after takeoff.

Attributes
ACN	1684902
Time
Date	201909
Local Time Of Day	0001-0600
Place
Locale Reference	PDX.Airport
State Reference	OR
Environment
Light	Night
Aircraft 1
Make Model Name	EMB ERJ 170/175 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Flight Director
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Excursion From Assigned Altitude

Narrative:

Takeoff roll began normally on [runway] 10R; upon rotation; the command bars immediately changed to the flight director; and at the same time; track mode changed to roll mode. The flight director was commanding a level off a few hundred feet above the runway; even though the altitude selector was set to 6000 ft.; the aircraft briefly entered magenta altitude hold a few hundred feet above the runway. As this happened; the auto-throttles then tried to roll back to maintain V2 + 10kts. (140 kts.) as though we were going to level off there. We immediately overrode the auto-throttles to continue the climb; then selected green flight level change and manual speeds at vfs. We changed LNAV and VNAV once at a safe altitude. During the brief cruise segment; just prior to descent we noted we had lost vertical pth guidance/VNAV profile on both mfds as well as both mcdus. Fuel remaining at arrival; and ETA were also missing from the mfds. We notified ATC we didn't have VNAV guidance and requested them to descend us. About 50 miles from destination; VNAV profile began working and we were able to resume the arrival as published.

Original NASA ASRS Text

Title: E175 flight crew reported the loss of flight director presentations immediately after takeoff.

Narrative: Takeoff roll began normally on [Runway] 10R; upon rotation; the command bars immediately changed to the flight director; and at the same time; track mode changed to roll mode. The flight director was commanding a level off a few hundred feet above the runway; even though the altitude selector was set to 6000 ft.; the aircraft briefly entered magenta ALT hold a few hundred feet above the runway. As this happened; the auto-throttles then tried to roll back to maintain V2 + 10kts. (140 kts.) as though we were going to level off there. We immediately overrode the auto-throttles to continue the climb; then selected green flight level change and manual speeds at VFS. We changed LNAV and VNAV once at a safe altitude. During the brief cruise segment; just prior to descent we noted we had lost vertical PTH guidance/VNAV profile on both MFDs as well as both MCDUs. Fuel remaining at arrival; and ETA were also missing from the MFDs. We notified ATC we didn't have VNAV guidance and requested them to descend us. About 50 miles from destination; VNAV profile began working and we were able to resume the arrival as published.

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.