B767 flight crew reported right pack overheat followed by cabin altitude warning in flight.

Attributes
ACN	1618481
Time
Date	201902
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 25000
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Total 17000
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

During cruise at FL390; received right pack overheat/right pack inop lights. Two minutes into cool down period; received cable altitude alert. Accomplished emergency action procedures; followed by emergency descent to 10;000 [feet]. After level off; right pack reset normally in accordance with (in accordance with) QRH procedure. Maximum cabin altitude was 12;000 feet. After pack reset; cabin pressure returned to normal. Flight continued to normal landing at ZZZ. Several flight attendants complained about hypoxic symptoms. Paramedics were called to meet upon gate arrival. Suspect event occurred due to overheat/failure of right pack and left pack being unable to maintain cabin altitude.was informed that this was the third occurrence on this aircraft. This would have been good to know information prior to takeoff and may have allowed the crew to be more alert and prepared for this possibility.

Original NASA ASRS Text

Title: B767 flight crew reported right pack overheat followed by cabin altitude warning in flight.

Narrative: During cruise at FL390; received Right Pack Overheat/Right Pack Inop Lights. Two minutes into cool down period; received cable altitude alert. Accomplished emergency action procedures; followed by emergency descent to 10;000 [feet]. After level off; right pack reset normally IAW (in accordance with) QRH procedure. Maximum cabin altitude was 12;000 feet. After pack reset; cabin pressure returned to normal. Flight continued to normal landing at ZZZ. Several flight attendants complained about hypoxic symptoms. Paramedics were called to meet upon gate arrival. Suspect event occurred due to overheat/failure of right pack and left pack being unable to maintain cabin altitude.Was informed that this was the third occurrence on this aircraft. This would have been good to know information prior to takeoff and may have allowed the crew to be more alert and prepared for this possibility.

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.