Air carrier captain reported a failure of the right main landing gear to retract fully after takeoff...

Narrative:

On departure; when landing gear retracted; got primary and secondary red indications of right main landing gear and/or gear doors not fully retracted. Contacted departure control; continued departure procedure at 210 KIAS and leveled at 10000 MSL headed northeast while running QRH. Complied with QRH; recycled gear down; got normal gear down indications; then gear handle back up. Same indications when gear retracted again. Consulted with maintenance; dispatch; sent ACARS air turn back message; and returned. Fuel dump was not necessary to land under maximum landing weight; did not declare an emergency as gear down indications were fully normal; no other malfunctions were present. On ground maintenance personnel stated right main gear door recently underwent major maintenance. Gear system may need further tweaking.

Original NASA ASRS Text

Title: Air carrier Captain reported a failure of the right main landing gear to retract fully after takeoff. QRH procedures were complied with; but were unsuccessful and the flight returned to the departure airport.

Narrative: On departure; when landing gear retracted; got primary and secondary red indications of right main landing gear and/or gear doors not fully retracted. Contacted departure control; continued departure procedure at 210 KIAS and leveled at 10000 MSL headed northeast while running QRH. Complied with QRH; recycled gear down; got normal gear down indications; then gear handle back up. Same indications when gear retracted again. Consulted with Maintenance; Dispatch; sent ACARS air turn back message; and returned. Fuel dump was not necessary to land under maximum landing weight; did not declare an emergency as gear down indications were fully normal; no other malfunctions were present. On ground Maintenance personnel stated right main gear door recently underwent major maintenance. Gear system may need further tweaking.

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.

Attributes
ACN	1435642
Time
Date	201703
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Make Model Name	Widebody Transport
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Component
Aircraft Component	Main Gear Door
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Air carrier captain reported a failure of the right main landing gear to retract fully after takeoff. QRH procedures were complied with; but were unsuccessful and the flight returned to the departure airport.