A Peruvian jetliner crashed into the Pacific Ocean because workers forgot to remove duct tape they had put over key sensors while cleaning the outside of the plane, NBC News reported. The Aeroperu Boeing 757 crashed into the Pacific Ocean shortly after taking off from the Peruvian capital, Lima, on Oct. 2. All 70 people on board were killed. Workers had placed the duct tape over the sensors--which monitor air pressure and help track altitude and airspeed--while polishing the outside of the airplane, NBC said. In Seattle, Liz Verdier, a spokeswoman for Boeing Commercial Airplane Group, said she could not comment on the report.