The captain of a Lion Air flight from Indonesia’s Bali island reported a “speed and altimeter” problem minutes after takeoff but resolved the issue and continued on to Jakarta, where the same plane crashed hours later, killing all 189 people aboard, according to a report.

After overcoming the problem, the pilot alerted air-traffic controllers that he did not have to fly the new Boeing 737 Max 8 back to Bali, the chief of the airport authority for the Bali-Nusa Tenggara area told Reuters.

“The captain himself was confident enough to fly to Jakarta from Denpasar,” Herson, who goes by one name, told the news outlet, referring to the resort island’s airport.

“The pilot double-checked to ensure that they could fly,” he said, adding that the aircraft had encountered a “speed and altimeter” problem.

The plane flew erratically and its airspeed readings were unreliable, according to an accident investigator.

It displayed unusual variations in altitude and airspeed in the first several minutes of flight — including an 875-foot drop over 27 seconds — before stabilizing and flying on to Jakarta, according to data from FlightRadar24.

However, the crew kept the jet at a maximum altitude of 28,000 feet compared with 36,000 feet on the same route earlier in the week, according to Reuters.

The flight landed in Jakarta at 10:55 p.m. local time Sunday. Technicians checked the plane’s instruments and cleared it to take off at 6:20 a.m. the next day for Bangka island, airline spokesman Danang Mandala Prihantoro told Bloomberg.

It plummeted into the sea 13 minutes later.

Discrepancies in speed and altitude readings from air-pressure sensors — called Pitot tubes — can confuse pilots and have led to accidents, including the 2009 crash of an Air France plane in the Atlantic Ocean.

Investigators found a high-altitude ice storm had clogged the Air France plane’s Pitot tubes.

A passenger said in a talk show broadcast by Indonesia’s TVOne that the seatbelt signs were never turned off during the turbulent Lion Air flight from Bali.

“When the plane took off, it climbed and then went down. It rose again, and then dropped again violently, shaking,” said Diah Mardani.

“Everyone in the plane shouted Allahu Akbar (God is great), Subhanallah (Glory to God). We recited every prayer we knew.”

The pilot of another airliner was approaching Bali right after the doomed jet had taken off said he was ordered to circle above the airport and listened in to the conversation between the Lion Air pilot and controllers.

“Because of the ‘pan-pan’ call, we were told to hold off, circling the airport in the air,” said the pilot, who declined to be named. “The Lion plane requested to return back to Bali five minutes after take-off, but then the pilot said the problem had been resolved and he was going to go ahead to Jakarta.”

Pilots use “pan-pan” calls to advise of urgent situations. They are a step down from “Mayday,” which signals distress that poses an imminent danger to the flight.

Lion Air president Edward Sirait has previously said the 737 had experienced a technical problem on the earlier flight but did not elaborate other than saying the issue was resolved in accordance with Boeing’s procedures.

An airline spokesman declined to comment Thursday when asked about the alert on the earlier flight, citing the ongoing crash investigation.

Meanwhile, divers on Thursday retrieved one of the plane’s flight recorders, which lay shattered on the muddy seafloor off the coast of Jakarta.

Investigators said they would examine the device for data on what happened on the flight from Bali, in addition to the flight that crashed on Monday.

Bambang Irawan, an investigator with the transport safety committee, initially said the device was the flight data recorder.

But at a later news conference, another investigator, Ony Soeryo Wibowo, said they still haven’t determined if it’s the flight data or cockpit voice recorder.

“Their forms are similar,” he said.

The flight data recorder is expected to provide detailed information about the flight such as altitude, airspeed and heading. The voice recorder provides the pilots’ conversations, as well as engine sounds, instrumentation warnings and other audio.

With Post wires